/*
    * Licensed to the Apache Software Foundation (ASF) under one or more
    * contributor license agreements.  See the NOTICE file distributed with
    * this work for additional information regarding copyright ownership.
    * The ASF licenses this file to You under the Apache License, Version 2.0
    * (the "License"); you may not use this file except in compliance with
    * the License.  You may obtain a copy of the License at
    *
    *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.apache.commons.lang3;
  
  import java.lang.reflect.Array;
  import java.util.Arrays;
  import java.util.BitSet;
  import java.util.HashMap;
  import java.util.Map;
  
  import org.apache.commons.lang3.builder.EqualsBuilder;
  import org.apache.commons.lang3.builder.HashCodeBuilder;
  import org.apache.commons.lang3.builder.ToStringBuilder;
  import org.apache.commons.lang3.builder.ToStringStyle;
  import org.apache.commons.lang3.mutable.MutableInt;
  
  /**
   * <p>Operations on arrays, primitive arrays (like {@code int[]}) and
   * primitive wrapper arrays (like {@code Integer[]}).</p>
   *
   * <p>This class tries to handle {@code null} input gracefully.
   * An exception will not be thrown for a {@code null}
   * array input. However, an Object array that contains a {@code null}
   * element may throw an exception. Each method documents its behaviour.</p>
   *
   * <p>#ThreadSafe#</p>
   * @since 2.0
   * @version $Id: ArrayUtils.java 1436770 2013-01-22 07:09:45Z ggregory $
   */
  public class ArrayUtils {
  
      /**
       * An empty immutable {@code Object} array.
       */
      public static final Object[] EMPTY_OBJECT_ARRAY = new Object[0];
      /**
       * An empty immutable {@code Class} array.
       */
      public static final Class<?>[] EMPTY_CLASS_ARRAY = new Class[0];
      /**
       * An empty immutable {@code String} array.
       */
      public static final String[] EMPTY_STRING_ARRAY = new String[0];
      /**
       * An empty immutable {@code long} array.
       */
      public static final long[] EMPTY_LONG_ARRAY = new long[0];
      /**
       * An empty immutable {@code Long} array.
       */
      public static final Long[] EMPTY_LONG_OBJECT_ARRAY = new Long[0];
      /**
       * An empty immutable {@code int} array.
       */
      public static final int[] EMPTY_INT_ARRAY = new int[0];
      /**
       * An empty immutable {@code Integer} array.
       */
      public static final Integer[] EMPTY_INTEGER_OBJECT_ARRAY = new Integer[0];
      /**
       * An empty immutable {@code short} array.
       */
      public static final short[] EMPTY_SHORT_ARRAY = new short[0];
      /**
       * An empty immutable {@code Short} array.
       */
      public static final Short[] EMPTY_SHORT_OBJECT_ARRAY = new Short[0];
      /**
       * An empty immutable {@code byte} array.
       */
      public static final byte[] EMPTY_BYTE_ARRAY = new byte[0];
      /**
       * An empty immutable {@code Byte} array.
       */
      public static final Byte[] EMPTY_BYTE_OBJECT_ARRAY = new Byte[0];
      /**
       * An empty immutable {@code double} array.
       */
      public static final double[] EMPTY_DOUBLE_ARRAY = new double[0];
      /**
       * An empty immutable {@code Double} array.
       */
      public static final Double[] EMPTY_DOUBLE_OBJECT_ARRAY = new Double[0];
      /**
       * An empty immutable {@code float} array.
      */
     public static final float[] EMPTY_FLOAT_ARRAY = new float[0];
     /**
      * An empty immutable {@code Float} array.
      */
     public static final Float[] EMPTY_FLOAT_OBJECT_ARRAY = new Float[0];
     /**
      * An empty immutable {@code boolean} array.
      */
     public static final boolean[] EMPTY_BOOLEAN_ARRAY = new boolean[0];
     /**
      * An empty immutable {@code Boolean} array.
      */
     public static final Boolean[] EMPTY_BOOLEAN_OBJECT_ARRAY = new Boolean[0];
     /**
      * An empty immutable {@code char} array.
      */
     public static final char[] EMPTY_CHAR_ARRAY = new char[0];
     /**
      * An empty immutable {@code Character} array.
      */
     public static final Character[] EMPTY_CHARACTER_OBJECT_ARRAY = new Character[0];
 
     /**
      * The index value when an element is not found in a list or array: {@code -1}.
      * This value is returned by methods in this class and can also be used in comparisons with values returned by
      * various method from {@link java.util.List}.
      */
     public static final int INDEX_NOT_FOUND = -1;
 
     /**
      * <p>ArrayUtils instances should NOT be constructed in standard programming.
      * Instead, the class should be used as <code>ArrayUtils.clone(new int[] {2})</code>.</p>
      *
      * <p>This constructor is public to permit tools that require a JavaBean instance
      * to operate.</p>
      */
     public ArrayUtils() {
       super();
     }
 
 
     // NOTE: Cannot use {@code} to enclose text which includes {}, but <code></code> is OK
 
 
     // Basic methods handling multi-dimensional arrays
     //-----------------------------------------------------------------------
     /**
      * <p>Outputs an array as a String, treating {@code null} as an empty array.</p>
      *
      * <p>Multi-dimensional arrays are handled correctly, including
      * multi-dimensional primitive arrays.</p>
      *
      * <p>The format is that of Java source code, for example <code>{a,b}</code>.</p>
      *
      * @param array  the array to get a toString for, may be {@code null}
      * @return a String representation of the array, '{}' if null array input
      */
     public static String toString(final Object array) {
         return toString(array, "{}");
     }
 
     /**
      * <p>Outputs an array as a String handling {@code null}s.</p>
      *
      * <p>Multi-dimensional arrays are handled correctly, including
      * multi-dimensional primitive arrays.</p>
      *
      * <p>The format is that of Java source code, for example <code>{a,b}</code>.</p>
      *
      * @param array  the array to get a toString for, may be {@code null}
      * @param stringIfNull  the String to return if the array is {@code null}
      * @return a String representation of the array
      */
     public static String toString(final Object array, final String stringIfNull) {
         if (array == null) {
             return stringIfNull;
         }
         return new ToStringBuilder(array, ToStringStyle.SIMPLE_STYLE).append(array).toString();
     }
 
     /**
      * <p>Get a hash code for an array handling multi-dimensional arrays correctly.</p>
      *
      * <p>Multi-dimensional primitive arrays are also handled correctly by this method.</p>
      *
      * @param array  the array to get a hash code for, {@code null} returns zero
      * @return a hash code for the array
      */
     public static int hashCode(final Object array) {
         return new HashCodeBuilder().append(array).toHashCode();
     }
 
     /**
      * <p>Compares two arrays, using equals(), handling multi-dimensional arrays
      * correctly.</p>
      *
      * <p>Multi-dimensional primitive arrays are also handled correctly by this method.</p>
      *
      * @param array1  the left hand array to compare, may be {@code null}
      * @param array2  the right hand array to compare, may be {@code null}
      * @return {@code true} if the arrays are equal
      */
     public static boolean isEquals(final Object array1, final Object array2) {
         return new EqualsBuilder().append(array1, array2).isEquals();
     }
 
     // To map
     //-----------------------------------------------------------------------
     /**
      * <p>Converts the given array into a {@link java.util.Map}. Each element of the array
      * must be either a {@link java.util.Map.Entry} or an Array, containing at least two
      * elements, where the first element is used as key and the second as
      * value.</p>
      *
      * <p>This method can be used to initialize:</p>
      * <pre>
      * // Create a Map mapping colors.
      * Map colorMap = MapUtils.toMap(new String[][] {{
      *     {"RED", "#FF0000"},
      *     {"GREEN", "#00FF00"},
      *     {"BLUE", "#0000FF"}});
      * </pre>
      *
      * <p>This method returns {@code null} for a {@code null} input array.</p>
      *
      * @param array  an array whose elements are either a {@link java.util.Map.Entry} or
      *  an Array containing at least two elements, may be {@code null}
      * @return a {@code Map} that was created from the array
      * @throws IllegalArgumentException  if one element of this Array is
      *  itself an Array containing less then two elements
      * @throws IllegalArgumentException  if the array contains elements other
      *  than {@link java.util.Map.Entry} and an Array
      */
     public static Map<Object, Object> toMap(final Object[] array) {
         if (array == null) {
             return null;
         }
         final Map<Object, Object> map = new HashMap<Object, Object>((int) (array.length * 1.5));
         for (int i = 0; i < array.length; i++) {
             final Object object = array[i];
             if (object instanceof Map.Entry<?, ?>) {
                 final Map.Entry<?,?> entry = (Map.Entry<?,?>) object;
                 map.put(entry.getKey(), entry.getValue());
             } else if (object instanceof Object[]) {
                 final Object[] entry = (Object[]) object;
                 if (entry.length < 2) {
                     throw new IllegalArgumentException("Array element " + i + ", '"
                         + object
                         + "', has a length less than 2");
                 }
                 map.put(entry[0], entry[1]);
             } else {
                 throw new IllegalArgumentException("Array element " + i + ", '"
                         + object
                         + "', is neither of type Map.Entry nor an Array");
             }
         }
         return map;
     }
 
     // Generic array
     //-----------------------------------------------------------------------
     /**
      * <p>Create a type-safe generic array.</p>
      *
      * <p>The Java language does not allow an array to be created from a generic type:</p>
      *
      * <pre>
     public static &lt;T&gt; T[] createAnArray(int size) {
         return new T[size]; // compiler error here
     }
     public static &lt;T&gt; T[] createAnArray(int size) {
         return (T[])new Object[size]; // ClassCastException at runtime
     }
      * </pre>
      *
      * <p>Therefore new arrays of generic types can be created with this method.
      * For example, an array of Strings can be created:</p>
      *
      * <pre>
     String[] array = ArrayUtils.toArray("1", "2");
     String[] emptyArray = ArrayUtils.&lt;String&gt;toArray();
      * </pre>
      *
      * <p>The method is typically used in scenarios, where the caller itself uses generic types
      * that have to be combined into an array.</p>
      *
      * <p>Note, this method makes only sense to provide arguments of the same type so that the
      * compiler can deduce the type of the array itself. While it is possible to select the
      * type explicitly like in
      * <code>Number[] array = ArrayUtils.&lt;Number&gt;toArray(Integer.valueOf(42), Double.valueOf(Math.PI))</code>,
      * there is no real advantage when compared to
      * <code>new Number[] {Integer.valueOf(42), Double.valueOf(Math.PI)}</code>.</p>
      *
      * @param  <T>   the array's element type
      * @param  items  the varargs array items, null allowed
      * @return the array, not null unless a null array is passed in
      * @since  3.0
      */
     public static <T> T[] toArray(final T... items) {
         return items;
     }
 
     // Clone
     //-----------------------------------------------------------------------
     /**
      * <p>Shallow clones an array returning a typecast result and handling
      * {@code null}.</p>
      *
      * <p>The objects in the array are not cloned, thus there is no special
      * handling for multi-dimensional arrays.</p>
      *
      * <p>This method returns {@code null} for a {@code null} input array.</p>
      *
      * @param <T> the component type of the array
      * @param array  the array to shallow clone, may be {@code null}
      * @return the cloned array, {@code null} if {@code null} input
      */
     public static <T> T[] clone(final T[] array) {
         if (array == null) {
             return null;
         }
         return array.clone();
     }
 
     /**
      * <p>Clones an array returning a typecast result and handling
      * {@code null}.</p>
      *
      * <p>This method returns {@code null} for a {@code null} input array.</p>
      *
      * @param array  the array to clone, may be {@code null}
      * @return the cloned array, {@code null} if {@code null} input
      */
     public static long[] clone(final long[] array) {
         if (array == null) {
             return null;
         }
         return array.clone();
     }
 
     /**
      * <p>Clones an array returning a typecast result and handling
      * {@code null}.</p>
      *
      * <p>This method returns {@code null} for a {@code null} input array.</p>
      *
      * @param array  the array to clone, may be {@code null}
      * @return the cloned array, {@code null} if {@code null} input
      */
     public static int[] clone(final int[] array) {
         if (array == null) {
             return null;
         }
         return array.clone();
     }
 
     /**
      * <p>Clones an array returning a typecast result and handling
      * {@code null}.</p>
      *
      * <p>This method returns {@code null} for a {@code null} input array.</p>
      *
      * @param array  the array to clone, may be {@code null}
      * @return the cloned array, {@code null} if {@code null} input
      */
     public static short[] clone(final short[] array) {
         if (array == null) {
             return null;
         }
         return array.clone();
     }
 
     /**
      * <p>Clones an array returning a typecast result and handling
      * {@code null}.</p>
      *
      * <p>This method returns {@code null} for a {@code null} input array.</p>
      *
      * @param array  the array to clone, may be {@code null}
      * @return the cloned array, {@code null} if {@code null} input
      */
     public static char[] clone(final char[] array) {
         if (array == null) {
             return null;
         }
         return array.clone();
     }
 
     /**
      * <p>Clones an array returning a typecast result and handling
      * {@code null}.</p>
      *
      * <p>This method returns {@code null} for a {@code null} input array.</p>
      *
      * @param array  the array to clone, may be {@code null}
      * @return the cloned array, {@code null} if {@code null} input
      */
     public static byte[] clone(final byte[] array) {
         if (array == null) {
             return null;
         }
         return array.clone();
     }
 
     /**
      * <p>Clones an array returning a typecast result and handling
      * {@code null}.</p>
      *
      * <p>This method returns {@code null} for a {@code null} input array.</p>
      *
      * @param array  the array to clone, may be {@code null}
      * @return the cloned array, {@code null} if {@code null} input
      */
     public static double[] clone(final double[] array) {
         if (array == null) {
             return null;
         }
         return array.clone();
     }
 
     /**
      * <p>Clones an array returning a typecast result and handling
      * {@code null}.</p>
      *
      * <p>This method returns {@code null} for a {@code null} input array.</p>
      *
      * @param array  the array to clone, may be {@code null}
      * @return the cloned array, {@code null} if {@code null} input
      */
     public static float[] clone(final float[] array) {
         if (array == null) {
             return null;
         }
         return array.clone();
     }
 
     /**
      * <p>Clones an array returning a typecast result and handling
      * {@code null}.</p>
      *
      * <p>This method returns {@code null} for a {@code null} input array.</p>
      *
      * @param array  the array to clone, may be {@code null}
      * @return the cloned array, {@code null} if {@code null} input
      */
     public static boolean[] clone(final boolean[] array) {
         if (array == null) {
             return null;
         }
         return array.clone();
     }
 
     // nullToEmpty
     //-----------------------------------------------------------------------
     /**
      * <p>Defensive programming technique to change a {@code null}
      * reference to an empty one.</p>
      *
      * <p>This method returns an empty array for a {@code null} input array.</p>
      *
      * <p>As a memory optimizing technique an empty array passed in will be overridden with
      * the empty {@code public static} references in this class.</p>
      *
      * @param array  the array to check for {@code null} or empty
      * @return the same array, {@code public static} empty array if {@code null} or empty input
      * @since 2.5
      */
     public static Object[] nullToEmpty(final Object[] array) {
         if (array == null || array.length == 0) {
             return EMPTY_OBJECT_ARRAY;
         }
         return array;
     }
 
     /**
      * <p>Defensive programming technique to change a {@code null}
      * reference to an empty one.</p>
      *
      * <p>This method returns an empty array for a {@code null} input array.</p>
      *
      * <p>As a memory optimizing technique an empty array passed in will be overridden with
      * the empty {@code public static} references in this class.</p>
      *
      * @param array  the array to check for {@code null} or empty
      * @return the same array, {@code public static} empty array if {@code null} or empty input
      * @since 2.5
      */
     public static String[] nullToEmpty(final String[] array) {
         if (array == null || array.length == 0) {
             return EMPTY_STRING_ARRAY;
         }
         return array;
     }
 
     /**
      * <p>Defensive programming technique to change a {@code null}
      * reference to an empty one.</p>
      *
      * <p>This method returns an empty array for a {@code null} input array.</p>
      *
      * <p>As a memory optimizing technique an empty array passed in will be overridden with
      * the empty {@code public static} references in this class.</p>
      *
      * @param array  the array to check for {@code null} or empty
      * @return the same array, {@code public static} empty array if {@code null} or empty input
      * @since 2.5
      */
     public static long[] nullToEmpty(final long[] array) {
         if (array == null || array.length == 0) {
             return EMPTY_LONG_ARRAY;
         }
         return array;
     }
 
     /**
      * <p>Defensive programming technique to change a {@code null}
      * reference to an empty one.</p>
      *
      * <p>This method returns an empty array for a {@code null} input array.</p>
      *
      * <p>As a memory optimizing technique an empty array passed in will be overridden with
      * the empty {@code public static} references in this class.</p>
      *
      * @param array  the array to check for {@code null} or empty
      * @return the same array, {@code public static} empty array if {@code null} or empty input
      * @since 2.5
      */
     public static int[] nullToEmpty(final int[] array) {
         if (array == null || array.length == 0) {
             return EMPTY_INT_ARRAY;
         }
         return array;
     }
 
     /**
      * <p>Defensive programming technique to change a {@code null}
      * reference to an empty one.</p>
      *
      * <p>This method returns an empty array for a {@code null} input array.</p>
      *
      * <p>As a memory optimizing technique an empty array passed in will be overridden with
      * the empty {@code public static} references in this class.</p>
      *
      * @param array  the array to check for {@code null} or empty
      * @return the same array, {@code public static} empty array if {@code null} or empty input
      * @since 2.5
      */
     public static short[] nullToEmpty(final short[] array) {
         if (array == null || array.length == 0) {
             return EMPTY_SHORT_ARRAY;
         }
         return array;
     }
 
     /**
      * <p>Defensive programming technique to change a {@code null}
      * reference to an empty one.</p>
      *
      * <p>This method returns an empty array for a {@code null} input array.</p>
      *
      * <p>As a memory optimizing technique an empty array passed in will be overridden with
      * the empty {@code public static} references in this class.</p>
      *
      * @param array  the array to check for {@code null} or empty
      * @return the same array, {@code public static} empty array if {@code null} or empty input
      * @since 2.5
      */
     public static char[] nullToEmpty(final char[] array) {
         if (array == null || array.length == 0) {
             return EMPTY_CHAR_ARRAY;
         }
         return array;
     }
 
     /**
      * <p>Defensive programming technique to change a {@code null}
      * reference to an empty one.</p>
      *
      * <p>This method returns an empty array for a {@code null} input array.</p>
      *
      * <p>As a memory optimizing technique an empty array passed in will be overridden with
      * the empty {@code public static} references in this class.</p>
      *
      * @param array  the array to check for {@code null} or empty
      * @return the same array, {@code public static} empty array if {@code null} or empty input
      * @since 2.5
      */
     public static byte[] nullToEmpty(final byte[] array) {
         if (array == null || array.length == 0) {
             return EMPTY_BYTE_ARRAY;
         }
         return array;
     }
 
     /**
      * <p>Defensive programming technique to change a {@code null}
      * reference to an empty one.</p>
      *
      * <p>This method returns an empty array for a {@code null} input array.</p>
      *
      * <p>As a memory optimizing technique an empty array passed in will be overridden with
      * the empty {@code public static} references in this class.</p>
      *
      * @param array  the array to check for {@code null} or empty
      * @return the same array, {@code public static} empty array if {@code null} or empty input
      * @since 2.5
      */
     public static double[] nullToEmpty(final double[] array) {
         if (array == null || array.length == 0) {
             return EMPTY_DOUBLE_ARRAY;
         }
         return array;
     }
 
     /**
      * <p>Defensive programming technique to change a {@code null}
      * reference to an empty one.</p>
      *
      * <p>This method returns an empty array for a {@code null} input array.</p>
      *
      * <p>As a memory optimizing technique an empty array passed in will be overridden with
      * the empty {@code public static} references in this class.</p>
      *
      * @param array  the array to check for {@code null} or empty
      * @return the same array, {@code public static} empty array if {@code null} or empty input
      * @since 2.5
      */
     public static float[] nullToEmpty(final float[] array) {
         if (array == null || array.length == 0) {
             return EMPTY_FLOAT_ARRAY;
         }
         return array;
     }
 
     /**
      * <p>Defensive programming technique to change a {@code null}
      * reference to an empty one.</p>
      *
      * <p>This method returns an empty array for a {@code null} input array.</p>
      *
      * <p>As a memory optimizing technique an empty array passed in will be overridden with
      * the empty {@code public static} references in this class.</p>
      *
      * @param array  the array to check for {@code null} or empty
      * @return the same array, {@code public static} empty array if {@code null} or empty input
      * @since 2.5
      */
     public static boolean[] nullToEmpty(final boolean[] array) {
         if (array == null || array.length == 0) {
             return EMPTY_BOOLEAN_ARRAY;
         }
         return array;
     }
 
     /**
      * <p>Defensive programming technique to change a {@code null}
      * reference to an empty one.</p>
      *
      * <p>This method returns an empty array for a {@code null} input array.</p>
      *
      * <p>As a memory optimizing technique an empty array passed in will be overridden with
      * the empty {@code public static} references in this class.</p>
      *
      * @param array  the array to check for {@code null} or empty
      * @return the same array, {@code public static} empty array if {@code null} or empty input
      * @since 2.5
      */
     public static Long[] nullToEmpty(final Long[] array) {
         if (array == null || array.length == 0) {
             return EMPTY_LONG_OBJECT_ARRAY;
         }
         return array;
     }
 
     /**
      * <p>Defensive programming technique to change a {@code null}
      * reference to an empty one.</p>
      *
      * <p>This method returns an empty array for a {@code null} input array.</p>
      *
      * <p>As a memory optimizing technique an empty array passed in will be overridden with
      * the empty {@code public static} references in this class.</p>
      *
      * @param array  the array to check for {@code null} or empty
      * @return the same array, {@code public static} empty array if {@code null} or empty input
      * @since 2.5
      */
     public static Integer[] nullToEmpty(final Integer[] array) {
         if (array == null || array.length == 0) {
             return EMPTY_INTEGER_OBJECT_ARRAY;
         }
         return array;
     }
 
     /**
      * <p>Defensive programming technique to change a {@code null}
      * reference to an empty one.</p>
      *
      * <p>This method returns an empty array for a {@code null} input array.</p>
      *
      * <p>As a memory optimizing technique an empty array passed in will be overridden with
      * the empty {@code public static} references in this class.</p>
      *
      * @param array  the array to check for {@code null} or empty
      * @return the same array, {@code public static} empty array if {@code null} or empty input
      * @since 2.5
      */
     public static Short[] nullToEmpty(final Short[] array) {
         if (array == null || array.length == 0) {
             return EMPTY_SHORT_OBJECT_ARRAY;
         }
         return array;
     }
 
     /**
      * <p>Defensive programming technique to change a {@code null}
      * reference to an empty one.</p>
      *
      * <p>This method returns an empty array for a {@code null} input array.</p>
      *
      * <p>As a memory optimizing technique an empty array passed in will be overridden with
      * the empty {@code public static} references in this class.</p>
      *
      * @param array  the array to check for {@code null} or empty
      * @return the same array, {@code public static} empty array if {@code null} or empty input
      * @since 2.5
      */
     public static Character[] nullToEmpty(final Character[] array) {
         if (array == null || array.length == 0) {
             return EMPTY_CHARACTER_OBJECT_ARRAY;
         }
         return array;
     }
 
     /**
      * <p>Defensive programming technique to change a {@code null}
      * reference to an empty one.</p>
      *
      * <p>This method returns an empty array for a {@code null} input array.</p>
      *
      * <p>As a memory optimizing technique an empty array passed in will be overridden with
      * the empty {@code public static} references in this class.</p>
      *
      * @param array  the array to check for {@code null} or empty
      * @return the same array, {@code public static} empty array if {@code null} or empty input
      * @since 2.5
      */
     public static Byte[] nullToEmpty(final Byte[] array) {
         if (array == null || array.length == 0) {
             return EMPTY_BYTE_OBJECT_ARRAY;
         }
         return array;
     }
 
     /**
      * <p>Defensive programming technique to change a {@code null}
      * reference to an empty one.</p>
      *
      * <p>This method returns an empty array for a {@code null} input array.</p>
      *
      * <p>As a memory optimizing technique an empty array passed in will be overridden with
      * the empty {@code public static} references in this class.</p>
      *
      * @param array  the array to check for {@code null} or empty
      * @return the same array, {@code public static} empty array if {@code null} or empty input
      * @since 2.5
      */
     public static Double[] nullToEmpty(final Double[] array) {
         if (array == null || array.length == 0) {
             return EMPTY_DOUBLE_OBJECT_ARRAY;
         }
         return array;
     }
 
     /**
      * <p>Defensive programming technique to change a {@code null}
      * reference to an empty one.</p>
      *
      * <p>This method returns an empty array for a {@code null} input array.</p>
      *
      * <p>As a memory optimizing technique an empty array passed in will be overridden with
      * the empty {@code public static} references in this class.</p>
      *
      * @param array  the array to check for {@code null} or empty
      * @return the same array, {@code public static} empty array if {@code null} or empty input
      * @since 2.5
      */
     public static Float[] nullToEmpty(final Float[] array) {
         if (array == null || array.length == 0) {
             return EMPTY_FLOAT_OBJECT_ARRAY;
         }
         return array;
     }
 
     /**
      * <p>Defensive programming technique to change a {@code null}
      * reference to an empty one.</p>
      *
      * <p>This method returns an empty array for a {@code null} input array.</p>
      *
      * <p>As a memory optimizing technique an empty array passed in will be overridden with
      * the empty {@code public static} references in this class.</p>
      *
      * @param array  the array to check for {@code null} or empty
      * @return the same array, {@code public static} empty array if {@code null} or empty input
      * @since 2.5
      */
     public static Boolean[] nullToEmpty(final Boolean[] array) {
         if (array == null || array.length == 0) {
             return EMPTY_BOOLEAN_OBJECT_ARRAY;
         }
         return array;
     }
 
     // Subarrays
     //-----------------------------------------------------------------------
     /**
      * <p>Produces a new array containing the elements between
      * the start and end indices.</p>
      *
      * <p>The start index is inclusive, the end index exclusive.
      * Null array input produces null output.</p>
      *
      * <p>The component type of the subarray is always the same as
      * that of the input array. Thus, if the input is an array of type
      * {@code Date}, the following usage is envisaged:</p>
      *
      * <pre>
      * Date[] someDates = (Date[])ArrayUtils.subarray(allDates, 2, 5);
      * </pre>
      *
      * @param <T> the component type of the array
      * @param array  the array
      * @param startIndexInclusive  the starting index. Undervalue (&lt;0)
      *      is promoted to 0, overvalue (&gt;array.length) results
      *      in an empty array.
      * @param endIndexExclusive  elements up to endIndex-1 are present in the
      *      returned subarray. Undervalue (&lt; startIndex) produces
      *      empty array, overvalue (&gt;array.length) is demoted to
      *      array length.
      * @return a new array containing the elements between
      *      the start and end indices.
      * @since 2.1
      */
     public static <T> T[] subarray(final T[] array, int startIndexInclusive, int endIndexExclusive) {
         if (array == null) {
             return null;
         }
         if (startIndexInclusive < 0) {
             startIndexInclusive = 0;
         }
         if (endIndexExclusive > array.length) {
             endIndexExclusive = array.length;
         }
         final int newSize = endIndexExclusive - startIndexInclusive;
         final Class<?> type = array.getClass().getComponentType();
         if (newSize <= 0) {
             @SuppressWarnings("unchecked") // OK, because array is of type T
             final T[] emptyArray = (T[]) Array.newInstance(type, 0);
             return emptyArray;
         }
         @SuppressWarnings("unchecked") // OK, because array is of type T
         final
         T[] subarray = (T[]) Array.newInstance(type, newSize);
         System.arraycopy(array, startIndexInclusive, subarray, 0, newSize);
         return subarray;
     }
 
     /**
      * <p>Produces a new {@code long} array containing the elements
      * between the start and end indices.</p>
      *
      * <p>The start index is inclusive, the end index exclusive.
      * Null array input produces null output.</p>
      *
      * @param array  the array
      * @param startIndexInclusive  the starting index. Undervalue (&lt;0)
      *      is promoted to 0, overvalue (&gt;array.length) results
      *      in an empty array.
      * @param endIndexExclusive  elements up to endIndex-1 are present in the
      *      returned subarray. Undervalue (&lt; startIndex) produces
      *      empty array, overvalue (&gt;array.length) is demoted to
      *      array length.
      * @return a new array containing the elements between
      *      the start and end indices.
      * @since 2.1
      */
     public static long[] subarray(final long[] array, int startIndexInclusive, int endIndexExclusive) {
         if (array == null) {
             return null;
         }
         if (startIndexInclusive < 0) {
             startIndexInclusive = 0;
         }
         if (endIndexExclusive > array.length) {
             endIndexExclusive = array.length;
         }
         final int newSize = endIndexExclusive - startIndexInclusive;
         if (newSize <= 0) {
             return EMPTY_LONG_ARRAY;
         }
 
         final long[] subarray = new long[newSize];
         System.arraycopy(array, startIndexInclusive, subarray, 0, newSize);
         return subarray;
     }
 
     /**
      * <p>Produces a new {@code int} array containing the elements
      * between the start and end indices.</p>
      *
      * <p>The start index is inclusive, the end index exclusive.
      * Null array input produces null output.</p>
      *
      * @param array  the array
      * @param startIndexInclusive  the starting index. Undervalue (&lt;0)
      *      is promoted to 0, overvalue (&gt;array.length) results
      *      in an empty array.
      * @param endIndexExclusive  elements up to endIndex-1 are present in the
      *      returned subarray. Undervalue (&lt; startIndex) produces
      *      empty array, overvalue (&gt;array.length) is demoted to
      *      array length.
      * @return a new array containing the elements between
      *      the start and end indices.
      * @since 2.1
      */
     public static int[] subarray(final int[] array, int startIndexInclusive, int endIndexExclusive) {
         if (array == null) {
             return null;
         }
         if (startIndexInclusive < 0) {
             startIndexInclusive = 0;
         }
         if (endIndexExclusive > array.length) {
             endIndexExclusive = array.length;
         }
         final int newSize = endIndexExclusive - startIndexInclusive;
         if (newSize <= 0) {
             return EMPTY_INT_ARRAY;
         }
 
         final int[] subarray = new int[newSize];
         System.arraycopy(array, startIndexInclusive, subarray, 0, newSize);
         return subarray;
     }
 
     /**
      * <p>Produces a new {@code short} array containing the elements
      * between the start and end indices.</p>
      *
      * <p>The start index is inclusive, the end index exclusive.
      * Null array input produces null output.</p>
      *
      * @param array  the array
      * @param startIndexInclusive  the starting index. Undervalue (&lt;0)
      *      is promoted to 0, overvalue (&gt;array.length) results
      *      in an empty array.
      * @param endIndexExclusive  elements up to endIndex-1 are present in the
      *      returned subarray. Undervalue (&lt; startIndex) produces
      *      empty array, overvalue (&gt;array.length) is demoted to
      *      array length.
      * @return a new array containing the elements between
      *      the start and end indices.
      * @since 2.1
      */
     public static short[] subarray(final short[] array, int startIndexInclusive, int endIndexExclusive) {
         if (array == null) {
             return null;
         }
         if (startIndexInclusive < 0) {
             startIndexInclusive = 0;
         }
         if (endIndexExclusive > array.length) {
             endIndexExclusive = array.length;
         }
         final int newSize = endIndexExclusive - startIndexInclusive;
         if (newSize <= 0) {
             return EMPTY_SHORT_ARRAY;
         }
 
         final short[] subarray = new short[newSize];
         System.arraycopy(array, startIndexInclusive, subarray, 0, newSize);
         return subarray;
     }
 
     /**
      * <p>Produces a new {@code char} array containing the elements
      * between the start and end indices.</p>
      *
      * <p>The start index is inclusive, the end index exclusive.
      * Null array input produces null output.</p>
      *
      * @param array  the array
      * @param startIndexInclusive  the starting index. Undervalue (&lt;0)
      *      is promoted to 0, overvalue (&gt;array.length) results
      *      in an empty array.
      * @param endIndexExclusive  elements up to endIndex-1 are present in the
      *      returned subarray. Undervalue (&lt; startIndex) produces
      *      empty array, overvalue (&gt;array.length) is demoted to
      *      array length.
      * @return a new array containing the elements between
      *      the start and end indices.
      * @since 2.1
      */
     public static char[] subarray(final char[] array, int startIndexInclusive, int endIndexExclusive) {
         if (array == null) {
             return null;
         }
         if (startIndexInclusive < 0) {
             startIndexInclusive = 0;
         }
         if (endIndexExclusive > array.length) {
             endIndexExclusive = array.length;
         }
         final int newSize = endIndexExclusive - startIndexInclusive;
         if (newSize <= 0) {
             return EMPTY_CHAR_ARRAY;
         }
 
         final char[] subarray = new char[newSize];
         System.arraycopy(array, startIndexInclusive, subarray, 0, newSize);
         return subarray;
     }
 
     /**
      * <p>Produces a new {@code byte} array containing the elements
      * between the start and end indices.</p>
      *
      * <p>The start index is inclusive, the end index exclusive.
      * Null array input produces null output.</p>
      *
      * @param array  the array
      * @param startIndexInclusive  the starting index. Undervalue (&lt;0)
      *      is promoted to 0, overvalue (&gt;array.length) results
      *      in an empty array.
      * @param endIndexExclusive  elements up to endIndex-1 are present in the
      *      returned subarray. Undervalue (&lt; startIndex) produces
      *      empty array, overvalue (&gt;array.length) is demoted to
      *      array length.
      * @return a new array containing the elements between
      *      the start and end indices.
      * @since 2.1
      */
     public static byte[] subarray(final byte[] array, int startIndexInclusive, int endIndexExclusive) {
         if (array == null) {
             return null;
         }
         if (startIndexInclusive < 0) {
             startIndexInclusive = 0;
         }
         if (endIndexExclusive > array.length) {
             endIndexExclusive = array.length;
         }
         final int newSize = endIndexExclusive - startIndexInclusive;
         if (newSize <= 0) {
             return EMPTY_BYTE_ARRAY;
         }
 
         final byte[] subarray = new byte[newSize];
         System.arraycopy(array, startIndexInclusive, subarray, 0, newSize);
         return subarray;
     }
 
     /**
      * <p>Produces a new {@code double} array containing the elements
      * between the start and end indices.</p>
      *
      * <p>The start index is inclusive, the end index exclusive.
      * Null array input produces null output.</p>
      *
      * @param array  the array
      * @param startIndexInclusive  the starting index. Undervalue (&lt;0)
      *      is promoted to 0, overvalue (&gt;array.length) results
      *      in an empty array.
      * @param endIndexExclusive  elements up to endIndex-1 are present in the
      *      returned subarray. Undervalue (&lt; startIndex) produces
      *      empty array, overvalue (&gt;array.length) is demoted to
      *      array length.
      * @return a new array containing the elements between
      *      the start and end indices.
      * @since 2.1
      */
     public static double[] subarray(final double[] array, int startIndexInclusive, int endIndexExclusive) {
         if (array == null) {
             return null;
         }
         if (startIndexInclusive < 0) {
             startIndexInclusive = 0;
         }
         if (endIndexExclusive > array.length) {
             endIndexExclusive = array.length;
         }
         final int newSize = endIndexExclusive - startIndexInclusive;
         if (newSize <= 0) {
             return EMPTY_DOUBLE_ARRAY;
         }
 
         final double[] subarray = new double[newSize];
         System.arraycopy(array, startIndexInclusive, subarray, 0, newSize);
         return subarray;
     }
 
     /**
      * <p>Produces a new {@code float} array containing the elements
      * between the start and end indices.</p>
      *
      * <p>The start index is inclusive, the end index exclusive.
      * Null array input produces null output.</p>
      *
      * @param array  the array
      * @param startIndexInclusive  the starting index. Undervalue (&lt;0)
      *      is promoted to 0, overvalue (&gt;array.length) results
      *      in an empty array.
      * @param endIndexExclusive  elements up to endIndex-1 are present in the
      *      returned subarray. Undervalue (&lt; startIndex) produces
      *      empty array, overvalue (&gt;array.length) is demoted to
      *      array length.
      * @return a new array containing the elements between
      *      the start and end indices.
      * @since 2.1
      */
     public static float[] subarray(final float[] array, int startIndexInclusive, int endIndexExclusive) {
         if (array == null) {
             return null;
         }
         if (startIndexInclusive < 0) {
             startIndexInclusive = 0;
         }
         if (endIndexExclusive > array.length) {
             endIndexExclusive = array.length;
         }
         final int newSize = endIndexExclusive - startIndexInclusive;
         if (newSize <= 0) {
             return EMPTY_FLOAT_ARRAY;
         }
 
         final float[] subarray = new float[newSize];
         System.arraycopy(array, startIndexInclusive, subarray, 0, newSize);
         return subarray;
     }
 
     /**
      * <p>Produces a new {@code boolean} array containing the elements
      * between the start and end indices.</p>
      *
      * <p>The start index is inclusive, the end index exclusive.
      * Null array input produces null output.</p>
      *
      * @param array  the array
      * @param startIndexInclusive  the starting index. Undervalue (&lt;0)
      *      is promoted to 0, overvalue (&gt;array.length) results
      *      in an empty array.
      * @param endIndexExclusive  elements up to endIndex-1 are present in the
      *      returned subarray. Undervalue (&lt; startIndex) produces
      *      empty array, overvalue (&gt;array.length) is demoted to
      *      array length.
      * @return a new array containing the elements between
      *      the start and end indices.
      * @since 2.1
      */
     public static boolean[] subarray(final boolean[] array, int startIndexInclusive, int endIndexExclusive) {
         if (array == null) {
             return null;
         }
         if (startIndexInclusive < 0) {
             startIndexInclusive = 0;
         }
         if (endIndexExclusive > array.length) {
             endIndexExclusive = array.length;
         }
         final int newSize = endIndexExclusive - startIndexInclusive;
         if (newSize <= 0) {
             return EMPTY_BOOLEAN_ARRAY;
         }
 
         final boolean[] subarray = new boolean[newSize];
         System.arraycopy(array, startIndexInclusive, subarray, 0, newSize);
         return subarray;
     }
 
     // Is same length
     //-----------------------------------------------------------------------
     /**
      * <p>Checks whether two arrays are the same length, treating
      * {@code null} arrays as length {@code 0}.
      *
      * <p>Any multi-dimensional aspects of the arrays are ignored.</p>
      *
      * @param array1 the first array, may be {@code null}
      * @param array2 the second array, may be {@code null}
      * @return {@code true} if length of arrays matches, treating
      *  {@code null} as an empty array
      */
     public static boolean isSameLength(final Object[] array1, final Object[] array2) {
         if ((array1 == null && array2 != null && array2.length > 0) ||
             (array2 == null && array1 != null && array1.length > 0) ||
             (array1 != null && array2 != null && array1.length != array2.length)) {
                 return false;
         }
         return true;
     }
 
     /**
      * <p>Checks whether two arrays are the same length, treating
      * {@code null} arrays as length {@code 0}.</p>
      *
      * @param array1 the first array, may be {@code null}
      * @param array2 the second array, may be {@code null}
      * @return {@code true} if length of arrays matches, treating
      *  {@code null} as an empty array
      */
     public static boolean isSameLength(final long[] array1, final long[] array2) {
         if ((array1 == null && array2 != null && array2.length > 0) ||
             (array2 == null && array1 != null && array1.length > 0) ||
             (array1 != null && array2 != null && array1.length != array2.length)) {
                 return false;
         }
         return true;
     }
 
     /**
      * <p>Checks whether two arrays are the same length, treating
      * {@code null} arrays as length {@code 0}.</p>
      *
      * @param array1 the first array, may be {@code null}
      * @param array2 the second array, may be {@code null}
      * @return {@code true} if length of arrays matches, treating
      *  {@code null} as an empty array
      */
     public static boolean isSameLength(final int[] array1, final int[] array2) {
         if ((array1 == null && array2 != null && array2.length > 0) ||
             (array2 == null && array1 != null && array1.length > 0) ||
             (array1 != null && array2 != null && array1.length != array2.length)) {
                 return false;
         }
         return true;
     }
 
     /**
      * <p>Checks whether two arrays are the same length, treating
      * {@code null} arrays as length {@code 0}.</p>
      *
      * @param array1 the first array, may be {@code null}
      * @param array2 the second array, may be {@code null}
      * @return {@code true} if length of arrays matches, treating
      *  {@code null} as an empty array
      */
     public static boolean isSameLength(final short[] array1, final short[] array2) {
         if ((array1 == null && array2 != null && array2.length > 0) ||
             (array2 == null && array1 != null && array1.length > 0) ||
             (array1 != null && array2 != null && array1.length != array2.length)) {
                 return false;
         }
         return true;
     }
 
     /**
      * <p>Checks whether two arrays are the same length, treating
      * {@code null} arrays as length {@code 0}.</p>
      *
      * @param array1 the first array, may be {@code null}
      * @param array2 the second array, may be {@code null}
      * @return {@code true} if length of arrays matches, treating
      *  {@code null} as an empty array
      */
     public static boolean isSameLength(final char[] array1, final char[] array2) {
         if ((array1 == null && array2 != null && array2.length > 0) ||
             (array2 == null && array1 != null && array1.length > 0) ||
             (array1 != null && array2 != null && array1.length != array2.length)) {
                 return false;
         }
         return true;
     }
 
     /**
      * <p>Checks whether two arrays are the same length, treating
      * {@code null} arrays as length {@code 0}.</p>
      *
      * @param array1 the first array, may be {@code null}
      * @param array2 the second array, may be {@code null}
      * @return {@code true} if length of arrays matches, treating
      *  {@code null} as an empty array
      */
     public static boolean isSameLength(final byte[] array1, final byte[] array2) {
         if ((array1 == null && array2 != null && array2.length > 0) ||
             (array2 == null && array1 != null && array1.length > 0) ||
             (array1 != null && array2 != null && array1.length != array2.length)) {
                 return false;
         }
         return true;
     }
 
     /**
      * <p>Checks whether two arrays are the same length, treating
      * {@code null} arrays as length {@code 0}.</p>
      *
      * @param array1 the first array, may be {@code null}
      * @param array2 the second array, may be {@code null}
      * @return {@code true} if length of arrays matches, treating
      *  {@code null} as an empty array
      */
     public static boolean isSameLength(final double[] array1, final double[] array2) {
         if ((array1 == null && array2 != null && array2.length > 0) ||
             (array2 == null && array1 != null && array1.length > 0) ||
             (array1 != null && array2 != null && array1.length != array2.length)) {
                 return false;
         }
         return true;
     }
 
     /**
      * <p>Checks whether two arrays are the same length, treating
      * {@code null} arrays as length {@code 0}.</p>
      *
      * @param array1 the first array, may be {@code null}
      * @param array2 the second array, may be {@code null}
      * @return {@code true} if length of arrays matches, treating
      *  {@code null} as an empty array
      */
     public static boolean isSameLength(final float[] array1, final float[] array2) {
         if ((array1 == null && array2 != null && array2.length > 0) ||
             (array2 == null && array1 != null && array1.length > 0) ||
             (array1 != null && array2 != null && array1.length != array2.length)) {
                 return false;
         }
         return true;
     }
 
     /**
      * <p>Checks whether two arrays are the same length, treating
      * {@code null} arrays as length {@code 0}.</p>
      *
      * @param array1 the first array, may be {@code null}
      * @param array2 the second array, may be {@code null}
      * @return {@code true} if length of arrays matches, treating
      *  {@code null} as an empty array
      */
     public static boolean isSameLength(final boolean[] array1, final boolean[] array2) {
         if ((array1 == null && array2 != null && array2.length > 0) ||
             (array2 == null && array1 != null && array1.length > 0) ||
             (array1 != null && array2 != null && array1.length != array2.length)) {
                 return false;
         }
         return true;
     }
 
     //-----------------------------------------------------------------------
     /**
      * <p>Returns the length of the specified array.
      * This method can deal with {@code Object} arrays and with primitive arrays.</p>
      *
      * <p>If the input array is {@code null}, {@code 0} is returned.</p>
      *
      * <pre>
      * ArrayUtils.getLength(null)            = 0
      * ArrayUtils.getLength([])              = 0
      * ArrayUtils.getLength([null])          = 1
      * ArrayUtils.getLength([true, false])   = 2
      * ArrayUtils.getLength([1, 2, 3])       = 3
      * ArrayUtils.getLength(["a", "b", "c"]) = 3
      * </pre>
      *
      * @param array  the array to retrieve the length from, may be null
      * @return The length of the array, or {@code 0} if the array is {@code null}
      * @throws IllegalArgumentException if the object argument is not an array.
      * @since 2.1
      */
     public static int getLength(final Object array) {
         if (array == null) {
             return 0;
         }
         return Array.getLength(array);
     }
 
     /**
      * <p>Checks whether two arrays are the same type taking into account
      * multi-dimensional arrays.</p>
      *
      * @param array1 the first array, must not be {@code null}
      * @param array2 the second array, must not be {@code null}
      * @return {@code true} if type of arrays matches
      * @throws IllegalArgumentException if either array is {@code null}
      */
     public static boolean isSameType(final Object array1, final Object array2) {
         if (array1 == null || array2 == null) {
             throw new IllegalArgumentException("The Array must not be null");
         }
         return array1.getClass().getName().equals(array2.getClass().getName());
     }
 
     // Reverse
     //-----------------------------------------------------------------------
     /**
      * <p>Reverses the order of the given array.</p>
      *
      * <p>There is no special handling for multi-dimensional arrays.</p>
      *
      * <p>This method does nothing for a {@code null} input array.</p>
      *
      * @param array  the array to reverse, may be {@code null}
      */
     public static void reverse(final Object[] array) {
         if (array == null) {
             return;
         }
         int i = 0;
         int j = array.length - 1;
         Object tmp;
         while (j > i) {
             tmp = array[j];
             array[j] = array[i];
             array[i] = tmp;
             j--;
             i++;
         }
     }
 
     /**
      * <p>Reverses the order of the given array.</p>
      *
      * <p>This method does nothing for a {@code null} input array.</p>
      *
      * @param array  the array to reverse, may be {@code null}
      */
     public static void reverse(final long[] array) {
         if (array == null) {
             return;
         }
         int i = 0;
         int j = array.length - 1;
         long tmp;
         while (j > i) {
             tmp = array[j];
             array[j] = array[i];
             array[i] = tmp;
             j--;
             i++;
         }
     }
 
     /**
      * <p>Reverses the order of the given array.</p>
      *
      * <p>This method does nothing for a {@code null} input array.</p>
      *
      * @param array  the array to reverse, may be {@code null}
      */
     public static void reverse(final int[] array) {
         if (array == null) {
             return;
         }
         int i = 0;
         int j = array.length - 1;
         int tmp;
         while (j > i) {
             tmp = array[j];
             array[j] = array[i];
             array[i] = tmp;
             j--;
             i++;
         }
     }
 
     /**
      * <p>Reverses the order of the given array.</p>
      *
      * <p>This method does nothing for a {@code null} input array.</p>
      *
      * @param array  the array to reverse, may be {@code null}
      */
     public static void reverse(final short[] array) {
         if (array == null) {
             return;
         }
         int i = 0;
         int j = array.length - 1;
         short tmp;
         while (j > i) {
             tmp = array[j];
             array[j] = array[i];
             array[i] = tmp;
             j--;
             i++;
         }
     }
 
     /**
      * <p>Reverses the order of the given array.</p>
      *
      * <p>This method does nothing for a {@code null} input array.</p>
      *
      * @param array  the array to reverse, may be {@code null}
      */
     public static void reverse(final char[] array) {
         if (array == null) {
             return;
         }
         int i = 0;
         int j = array.length - 1;
         char tmp;
         while (j > i) {
             tmp = array[j];
             array[j] = array[i];
             array[i] = tmp;
             j--;
             i++;
         }
     }
 
     /**
      * <p>Reverses the order of the given array.</p>
      *
      * <p>This method does nothing for a {@code null} input array.</p>
      *
      * @param array  the array to reverse, may be {@code null}
      */
     public static void reverse(final byte[] array) {
         if (array == null) {
             return;
         }
         int i = 0;
         int j = array.length - 1;
         byte tmp;
         while (j > i) {
             tmp = array[j];
             array[j] = array[i];
             array[i] = tmp;
             j--;
             i++;
         }
     }
 
     /**
      * <p>Reverses the order of the given array.</p>
      *
      * <p>This method does nothing for a {@code null} input array.</p>
      *
      * @param array  the array to reverse, may be {@code null}
      */
     public static void reverse(final double[] array) {
         if (array == null) {
             return;
         }
         int i = 0;
         int j = array.length - 1;
         double tmp;
         while (j > i) {
             tmp = array[j];
             array[j] = array[i];
             array[i] = tmp;
             j--;
             i++;
         }
     }
 
     /**
      * <p>Reverses the order of the given array.</p>
      *
      * <p>This method does nothing for a {@code null} input array.</p>
      *
      * @param array  the array to reverse, may be {@code null}
      */
     public static void reverse(final float[] array) {
         if (array == null) {
             return;
         }
         int i = 0;
         int j = array.length - 1;
         float tmp;
         while (j > i) {
             tmp = array[j];
             array[j] = array[i];
             array[i] = tmp;
             j--;
             i++;
         }
     }
 
     /**
      * <p>Reverses the order of the given array.</p>
      *
      * <p>This method does nothing for a {@code null} input array.</p>
      *
      * @param array  the array to reverse, may be {@code null}
      */
     public static void reverse(final boolean[] array) {
         if (array == null) {
             return;
         }
         int i = 0;
         int j = array.length - 1;
         boolean tmp;
         while (j > i) {
             tmp = array[j];
             array[j] = array[i];
             array[i] = tmp;
             j--;
             i++;
         }
     }
 
     // IndexOf search
     // ----------------------------------------------------------------------
 
     // Object IndexOf
     //-----------------------------------------------------------------------
     /**
      * <p>Finds the index of the given object in the array.</p>
      *
      * <p>This method returns {@link #INDEX_NOT_FOUND} ({@code -1}) for a {@code null} input array.</p>
      *
      * @param array  the array to search through for the object, may be {@code null}
      * @param objectToFind  the object to find, may be {@code null}
      * @return the index of the object within the array,
      *  {@link #INDEX_NOT_FOUND} ({@code -1}) if not found or {@code null} array input
      */
     public static int indexOf(final Object[] array, final Object objectToFind) {
         return indexOf(array, objectToFind, 0);
     }
 
     /**
      * <p>Finds the index of the given object in the array starting at the given index.</p>
      *
      * <p>This method returns {@link #INDEX_NOT_FOUND} ({@code -1}) for a {@code null} input array.</p>
      *
      * <p>A negative startIndex is treated as zero. A startIndex larger than the array
      * length will return {@link #INDEX_NOT_FOUND} ({@code -1}).</p>
      *
      * @param array  the array to search through for the object, may be {@code null}
      * @param objectToFind  the object to find, may be {@code null}
      * @param startIndex  the index to start searching at
      * @return the index of the object within the array starting at the index,
      *  {@link #INDEX_NOT_FOUND} ({@code -1}) if not found or {@code null} array input
      */
     public static int indexOf(final Object[] array, final Object objectToFind, int startIndex) {
         if (array == null) {
             return INDEX_NOT_FOUND;
         }
         if (startIndex < 0) {
             startIndex = 0;
         }
         if (objectToFind == null) {
             for (int i = startIndex; i < array.length; i++) {
                 if (array[i] == null) {
                     return i;
                 }
             }
         } else if (array.getClass().getComponentType().isInstance(objectToFind)) {
             for (int i = startIndex; i < array.length; i++) {
                 if (objectToFind.equals(array[i])) {
                     return i;
                 }
             }
         }
         return INDEX_NOT_FOUND;
     }
 
     /**
      * <p>Finds the last index of the given object within the array.</p>
      *
      * <p>This method returns {@link #INDEX_NOT_FOUND} ({@code -1}) for a {@code null} input array.</p>
      *
      * @param array  the array to travers backwords looking for the object, may be {@code null}
      * @param objectToFind  the object to find, may be {@code null}
      * @return the last index of the object within the array,
      *  {@link #INDEX_NOT_FOUND} ({@code -1}) if not found or {@code null} array input
      */
     public static int lastIndexOf(final Object[] array, final Object objectToFind) {
         return lastIndexOf(array, objectToFind, Integer.MAX_VALUE);
     }
 
     /**
      * <p>Finds the last index of the given object in the array starting at the given index.</p>
      *
      * <p>This method returns {@link #INDEX_NOT_FOUND} ({@code -1}) for a {@code null} input array.</p>
      *
      * <p>A negative startIndex will return {@link #INDEX_NOT_FOUND} ({@code -1}). A startIndex larger than
      * the array length will search from the end of the array.</p>
      *
      * @param array  the array to traverse for looking for the object, may be {@code null}
      * @param objectToFind  the object to find, may be {@code null}
      * @param startIndex  the start index to travers backwards from
      * @return the last index of the object within the array,
      *  {@link #INDEX_NOT_FOUND} ({@code -1}) if not found or {@code null} array input
      */
     public static int lastIndexOf(final Object[] array, final Object objectToFind, int startIndex) {
         if (array == null) {
             return INDEX_NOT_FOUND;
         }
         if (startIndex < 0) {
             return INDEX_NOT_FOUND;
         } else if (startIndex >= array.length) {
             startIndex = array.length - 1;
         }
         if (objectToFind == null) {
             for (int i = startIndex; i >= 0; i--) {
                 if (array[i] == null) {
                     return i;
                 }
             }
         } else if (array.getClass().getComponentType().isInstance(objectToFind)) {
             for (int i = startIndex; i >= 0; i--) {
                 if (objectToFind.equals(array[i])) {
                     return i;
                 }
             }
         }
         return INDEX_NOT_FOUND;
     }
 
     /**
      * <p>Checks if the object is in the given array.</p>
      *
      * <p>The method returns {@code false} if a {@code null} array is passed in.</p>
      *
      * @param array  the array to search through
      * @param objectToFind  the object to find
      * @return {@code true} if the array contains the object
      */
     public static boolean contains(final Object[] array, final Object objectToFind) {
         return indexOf(array, objectToFind) != INDEX_NOT_FOUND;
     }
 
     // long IndexOf
     //-----------------------------------------------------------------------
     /**
      * <p>Finds the index of the given value in the array.</p>
      *
      * <p>This method returns {@link #INDEX_NOT_FOUND} ({@code -1}) for a {@code null} input array.</p>
      *
      * @param array  the array to search through for the object, may be {@code null}
      * @param valueToFind  the value to find
      * @return the index of the value within the array,
      *  {@link #INDEX_NOT_FOUND} ({@code -1}) if not found or {@code null} array input
      */
     public static int indexOf(final long[] array, final long valueToFind) {
         return indexOf(array, valueToFind, 0);
     }
 
     /**
      * <p>Finds the index of the given value in the array starting at the given index.</p>
      *
      * <p>This method returns {@link #INDEX_NOT_FOUND} ({@code -1}) for a {@code null} input array.</p>
      *
      * <p>A negative startIndex is treated as zero. A startIndex larger than the array
      * length will return {@link #INDEX_NOT_FOUND} ({@code -1}).</p>
      *
      * @param array  the array to search through for the object, may be {@code null}
      * @param valueToFind  the value to find
      * @param startIndex  the index to start searching at
      * @return the index of the value within the array,
      *  {@link #INDEX_NOT_FOUND} ({@code -1}) if not found or {@code null} array input
      */
     public static int indexOf(final long[] array, final long valueToFind, int startIndex) {
         if (array == null) {
             return INDEX_NOT_FOUND;
         }
         if (startIndex < 0) {
             startIndex = 0;
         }
         for (int i = startIndex; i < array.length; i++) {
             if (valueToFind == array[i]) {
                 return i;
             }
         }
         return INDEX_NOT_FOUND;
     }
 
     /**
      * <p>Finds the last index of the given value within the array.</p>
      *
      * <p>This method returns {@link #INDEX_NOT_FOUND} ({@code -1}) for a {@code null} input array.</p>
      *
      * @param array  the array to travers backwords looking for the object, may be {@code null}
      * @param valueToFind  the object to find
      * @return the last index of the value within the array,
      *  {@link #INDEX_NOT_FOUND} ({@code -1}) if not found or {@code null} array input
      */
     public static int lastIndexOf(final long[] array, final long valueToFind) {
         return lastIndexOf(array, valueToFind, Integer.MAX_VALUE);
     }
 
     /**
      * <p>Finds the last index of the given value in the array starting at the given index.</p>
      *
      * <p>This method returns {@link #INDEX_NOT_FOUND} ({@code -1}) for a {@code null} input array.</p>
      *
      * <p>A negative startIndex will return {@link #INDEX_NOT_FOUND} ({@code -1}). A startIndex larger than the
      * array length will search from the end of the array.</p>
      *
      * @param array  the array to traverse for looking for the object, may be {@code null}
      * @param valueToFind  the value to find
      * @param startIndex  the start index to travers backwards from
      * @return the last index of the value within the array,
      *  {@link #INDEX_NOT_FOUND} ({@code -1}) if not found or {@code null} array input
      */
     public static int lastIndexOf(final long[] array, final long valueToFind, int startIndex) {
         if (array == null) {
             return INDEX_NOT_FOUND;
         }
         if (startIndex < 0) {
             return INDEX_NOT_FOUND;
         } else if (startIndex >= array.length) {
             startIndex = array.length - 1;
         }
         for (int i = startIndex; i >= 0; i--) {
             if (valueToFind == array[i]) {
                 return i;
             }
         }
         return INDEX_NOT_FOUND;
     }
 
     /**
      * <p>Checks if the value is in the given array.</p>
      *
      * <p>The method returns {@code false} if a {@code null} array is passed in.</p>
      *
      * @param array  the array to search through
      * @param valueToFind  the value to find
      * @return {@code true} if the array contains the object
      */
     public static boolean contains(final long[] array, final long valueToFind) {
         return indexOf(array, valueToFind) != INDEX_NOT_FOUND;
     }
 
     // int IndexOf
     //-----------------------------------------------------------------------
     /**
      * <p>Finds the index of the given value in the array.</p>
      *
      * <p>This method returns {@link #INDEX_NOT_FOUND} ({@code -1}) for a {@code null} input array.</p>
      *
      * @param array  the array to search through for the object, may be {@code null}
      * @param valueToFind  the value to find
      * @return the index of the value within the array,
      *  {@link #INDEX_NOT_FOUND} ({@code -1}) if not found or {@code null} array input
      */
     public static int indexOf(final int[] array, final int valueToFind) {
         return indexOf(array, valueToFind, 0);
     }
 
     /**
      * <p>Finds the index of the given value in the array starting at the given index.</p>
      *
      * <p>This method returns {@link #INDEX_NOT_FOUND} ({@code -1}) for a {@code null} input array.</p>
      *
      * <p>A negative startIndex is treated as zero. A startIndex larger than the array
      * length will return {@link #INDEX_NOT_FOUND} ({@code -1}).</p>
      *
      * @param array  the array to search through for the object, may be {@code null}
      * @param valueToFind  the value to find
      * @param startIndex  the index to start searching at
      * @return the index of the value within the array,
      *  {@link #INDEX_NOT_FOUND} ({@code -1}) if not found or {@code null} array input
      */
     public static int indexOf(final int[] array, final int valueToFind, int startIndex) {
         if (array == null) {
             return INDEX_NOT_FOUND;
         }
         if (startIndex < 0) {
             startIndex = 0;
         }
         for (int i = startIndex; i < array.length; i++) {
             if (valueToFind == array[i]) {
                 return i;
             }
         }
         return INDEX_NOT_FOUND;
     }
 
     /**
      * <p>Finds the last index of the given value within the array.</p>
      *
      * <p>This method returns {@link #INDEX_NOT_FOUND} ({@code -1}) for a {@code null} input array.</p>
      *
      * @param array  the array to travers backwords looking for the object, may be {@code null}
      * @param valueToFind  the object to find
      * @return the last index of the value within the array,
      *  {@link #INDEX_NOT_FOUND} ({@code -1}) if not found or {@code null} array input
      */
     public static int lastIndexOf(final int[] array, final int valueToFind) {
         return lastIndexOf(array, valueToFind, Integer.MAX_VALUE);
     }
 
     /**
      * <p>Finds the last index of the given value in the array starting at the given index.</p>
      *
      * <p>This method returns {@link #INDEX_NOT_FOUND} ({@code -1}) for a {@code null} input array.</p>
      *
      * <p>A negative startIndex will return {@link #INDEX_NOT_FOUND} ({@code -1}). A startIndex larger than the
      * array length will search from the end of the array.</p>
      *
      * @param array  the array to traverse for looking for the object, may be {@code null}
      * @param valueToFind  the value to find
      * @param startIndex  the start index to travers backwards from
      * @return the last index of the value within the array,
      *  {@link #INDEX_NOT_FOUND} ({@code -1}) if not found or {@code null} array input
      */
     public static int lastIndexOf(final int[] array, final int valueToFind, int startIndex) {
         if (array == null) {
             return INDEX_NOT_FOUND;
         }
         if (startIndex < 0) {
             return INDEX_NOT_FOUND;
         } else if (startIndex >= array.length) {
             startIndex = array.length - 1;
         }
         for (int i = startIndex; i >= 0; i--) {
             if (valueToFind == array[i]) {
                 return i;
             }
         }
         return INDEX_NOT_FOUND;
     }
 
     /**
      * <p>Checks if the value is in the given array.</p>
      *
      * <p>The method returns {@code false} if a {@code null} array is passed in.</p>
      *
      * @param array  the array to search through
      * @param valueToFind  the value to find
      * @return {@code true} if the array contains the object
      */
     public static boolean contains(final int[] array, final int valueToFind) {
         return indexOf(array, valueToFind) != INDEX_NOT_FOUND;
     }
 
     // short IndexOf
     //-----------------------------------------------------------------------
     /**
      * <p>Finds the index of the given value in the array.</p>
      *
      * <p>This method returns {@link #INDEX_NOT_FOUND} ({@code -1}) for a {@code null} input array.</p>
      *
      * @param array  the array to search through for the object, may be {@code null}
      * @param valueToFind  the value to find
      * @return the index of the value within the array,
      *  {@link #INDEX_NOT_FOUND} ({@code -1}) if not found or {@code null} array input
      */
     public static int indexOf(final short[] array, final short valueToFind) {
         return indexOf(array, valueToFind, 0);
     }
 
     /**
      * <p>Finds the index of the given value in the array starting at the given index.</p>
      *
      * <p>This method returns {@link #INDEX_NOT_FOUND} ({@code -1}) for a {@code null} input array.</p>
      *
      * <p>A negative startIndex is treated as zero. A startIndex larger than the array
      * length will return {@link #INDEX_NOT_FOUND} ({@code -1}).</p>
      *
      * @param array  the array to search through for the object, may be {@code null}
      * @param valueToFind  the value to find
      * @param startIndex  the index to start searching at
      * @return the index of the value within the array,
      *  {@link #INDEX_NOT_FOUND} ({@code -1}) if not found or {@code null} array input
      */
     public static int indexOf(final short[] array, final short valueToFind, int startIndex) {
         if (array == null) {
             return INDEX_NOT_FOUND;
         }
         if (startIndex < 0) {
             startIndex = 0;
         }
         for (int i = startIndex; i < array.length; i++) {
             if (valueToFind == array[i]) {
                 return i;
             }
         }
         return INDEX_NOT_FOUND;
     }
 
     /**
      * <p>Finds the last index of the given value within the array.</p>
      *
      * <p>This method returns {@link #INDEX_NOT_FOUND} ({@code -1}) for a {@code null} input array.</p>
      *
      * @param array  the array to travers backwords looking for the object, may be {@code null}
      * @param valueToFind  the object to find
      * @return the last index of the value within the array,
      *  {@link #INDEX_NOT_FOUND} ({@code -1}) if not found or {@code null} array input
      */
     public static int lastIndexOf(final short[] array, final short valueToFind) {
         return lastIndexOf(array, valueToFind, Integer.MAX_VALUE);
     }
 
     /**
      * <p>Finds the last index of the given value in the array starting at the given index.</p>
      *
      * <p>This method returns {@link #INDEX_NOT_FOUND} ({@code -1}) for a {@code null} input array.</p>
      *
      * <p>A negative startIndex will return {@link #INDEX_NOT_FOUND} ({@code -1}). A startIndex larger than the
      * array length will search from the end of the array.</p>
      *
      * @param array  the array to traverse for looking for the object, may be {@code null}
      * @param valueToFind  the value to find
      * @param startIndex  the start index to travers backwards from
      * @return the last index of the value within the array,
      *  {@link #INDEX_NOT_FOUND} ({@code -1}) if not found or {@code null} array input
      */
     public static int lastIndexOf(final short[] array, final short valueToFind, int startIndex) {
         if (array == null) {
             return INDEX_NOT_FOUND;
         }
         if (startIndex < 0) {
             return INDEX_NOT_FOUND;
         } else if (startIndex >= array.length) {
             startIndex = array.length - 1;
         }
         for (int i = startIndex; i >= 0; i--) {
             if (valueToFind == array[i]) {
                 return i;
             }
         }
         return INDEX_NOT_FOUND;
     }
 
     /**
      * <p>Checks if the value is in the given array.</p>
      *
      * <p>The method returns {@code false} if a {@code null} array is passed in.</p>
      *
      * @param array  the array to search through
      * @param valueToFind  the value to find
      * @return {@code true} if the array contains the object
      */
     public static boolean contains(final short[] array, final short valueToFind) {
         return indexOf(array, valueToFind) != INDEX_NOT_FOUND;
     }
 
     // char IndexOf
     //-----------------------------------------------------------------------
     /**
      * <p>Finds the index of the given value in the array.</p>
      *
      * <p>This method returns {@link #INDEX_NOT_FOUND} ({@code -1}) for a {@code null} input array.</p>
      *
      * @param array  the array to search through for the object, may be {@code null}
      * @param valueToFind  the value to find
      * @return the index of the value within the array,
      *  {@link #INDEX_NOT_FOUND} ({@code -1}) if not found or {@code null} array input
      * @since 2.1
      */
     public static int indexOf(final char[] array, final char valueToFind) {
         return indexOf(array, valueToFind, 0);
     }
 
     /**
      * <p>Finds the index of the given value in the array starting at the given index.</p>
      *
      * <p>This method returns {@link #INDEX_NOT_FOUND} ({@code -1}) for a {@code null} input array.</p>
      *
      * <p>A negative startIndex is treated as zero. A startIndex larger than the array
      * length will return {@link #INDEX_NOT_FOUND} ({@code -1}).</p>
      *
      * @param array  the array to search through for the object, may be {@code null}
      * @param valueToFind  the value to find
      * @param startIndex  the index to start searching at
      * @return the index of the value within the array,
      *  {@link #INDEX_NOT_FOUND} ({@code -1}) if not found or {@code null} array input
      * @since 2.1
      */
     public static int indexOf(final char[] array, final char valueToFind, int startIndex) {
         if (array == null) {
             return INDEX_NOT_FOUND;
         }
         if (startIndex < 0) {
             startIndex = 0;
         }
         for (int i = startIndex; i < array.length; i++) {
             if (valueToFind == array[i]) {
                 return i;
             }
         }
         return INDEX_NOT_FOUND;
     }
 
     /**
      * <p>Finds the last index of the given value within the array.</p>
      *
      * <p>This method returns {@link #INDEX_NOT_FOUND} ({@code -1}) for a {@code null} input array.</p>
      *
      * @param array  the array to travers backwords looking for the object, may be {@code null}
      * @param valueToFind  the object to find
      * @return the last index of the value within the array,
      *  {@link #INDEX_NOT_FOUND} ({@code -1}) if not found or {@code null} array input
      * @since 2.1
      */
     public static int lastIndexOf(final char[] array, final char valueToFind) {
         return lastIndexOf(array, valueToFind, Integer.MAX_VALUE);
     }
 
     /**
      * <p>Finds the last index of the given value in the array starting at the given index.</p>
      *
      * <p>This method returns {@link #INDEX_NOT_FOUND} ({@code -1}) for a {@code null} input array.</p>
      *
      * <p>A negative startIndex will return {@link #INDEX_NOT_FOUND} ({@code -1}). A startIndex larger than the
      * array length will search from the end of the array.</p>
      *
      * @param array  the array to traverse for looking for the object, may be {@code null}
      * @param valueToFind  the value to find
      * @param startIndex  the start index to travers backwards from
      * @return the last index of the value within the array,
      *  {@link #INDEX_NOT_FOUND} ({@code -1}) if not found or {@code null} array input
      * @since 2.1
      */
     public static int lastIndexOf(final char[] array, final char valueToFind, int startIndex) {
         if (array == null) {
             return INDEX_NOT_FOUND;
         }
         if (startIndex < 0) {
             return INDEX_NOT_FOUND;
         } else if (startIndex >= array.length) {
             startIndex = array.length - 1;
         }
         for (int i = startIndex; i >= 0; i--) {
             if (valueToFind == array[i]) {
                 return i;
             }
         }
         return INDEX_NOT_FOUND;
     }
 
     /**
      * <p>Checks if the value is in the given array.</p>
      *
      * <p>The method returns {@code false} if a {@code null} array is passed in.</p>
      *
      * @param array  the array to search through
      * @param valueToFind  the value to find
      * @return {@code true} if the array contains the object
      * @since 2.1
      */
     public static boolean contains(final char[] array, final char valueToFind) {
         return indexOf(array, valueToFind) != INDEX_NOT_FOUND;
     }
 
     // byte IndexOf
     //-----------------------------------------------------------------------
     /**
      * <p>Finds the index of the given value in the array.</p>
      *
      * <p>This method returns {@link #INDEX_NOT_FOUND} ({@code -1}) for a {@code null} input array.</p>
      *
      * @param array  the array to search through for the object, may be {@code null}
      * @param valueToFind  the value to find
      * @return the index of the value within the array,
      *  {@link #INDEX_NOT_FOUND} ({@code -1}) if not found or {@code null} array input
      */
     public static int indexOf(final byte[] array, final byte valueToFind) {
         return indexOf(array, valueToFind, 0);
     }
 
     /**
      * <p>Finds the index of the given value in the array starting at the given index.</p>
      *
      * <p>This method returns {@link #INDEX_NOT_FOUND} ({@code -1}) for a {@code null} input array.</p>
      *
      * <p>A negative startIndex is treated as zero. A startIndex larger than the array
      * length will return {@link #INDEX_NOT_FOUND} ({@code -1}).</p>
      *
      * @param array  the array to search through for the object, may be {@code null}
      * @param valueToFind  the value to find
      * @param startIndex  the index to start searching at
      * @return the index of the value within the array,
      *  {@link #INDEX_NOT_FOUND} ({@code -1}) if not found or {@code null} array input
      */
     public static int indexOf(final byte[] array, final byte valueToFind, int startIndex) {
         if (array == null) {
             return INDEX_NOT_FOUND;
         }
         if (startIndex < 0) {
             startIndex = 0;
         }
         for (int i = startIndex; i < array.length; i++) {
             if (valueToFind == array[i]) {
                 return i;
             }
         }
         return INDEX_NOT_FOUND;
     }
 
     /**
      * <p>Finds the last index of the given value within the array.</p>
      *
      * <p>This method returns {@link #INDEX_NOT_FOUND} ({@code -1}) for a {@code null} input array.</p>
      *
      * @param array  the array to travers backwords looking for the object, may be {@code null}
      * @param valueToFind  the object to find
      * @return the last index of the value within the array,
      *  {@link #INDEX_NOT_FOUND} ({@code -1}) if not found or {@code null} array input
      */
     public static int lastIndexOf(final byte[] array, final byte valueToFind) {
         return lastIndexOf(array, valueToFind, Integer.MAX_VALUE);
     }
 
     /**
      * <p>Finds the last index of the given value in the array starting at the given index.</p>
      *
      * <p>This method returns {@link #INDEX_NOT_FOUND} ({@code -1}) for a {@code null} input array.</p>
      *
      * <p>A negative startIndex will return {@link #INDEX_NOT_FOUND} ({@code -1}). A startIndex larger than the
      * array length will search from the end of the array.</p>
      *
      * @param array  the array to traverse for looking for the object, may be {@code null}
      * @param valueToFind  the value to find
      * @param startIndex  the start index to travers backwards from
      * @return the last index of the value within the array,
      *  {@link #INDEX_NOT_FOUND} ({@code -1}) if not found or {@code null} array input
      */
     public static int lastIndexOf(final byte[] array, final byte valueToFind, int startIndex) {
         if (array == null) {
             return INDEX_NOT_FOUND;
         }
         if (startIndex < 0) {
             return INDEX_NOT_FOUND;
         } else if (startIndex >= array.length) {
             startIndex = array.length - 1;
         }
         for (int i = startIndex; i >= 0; i--) {
             if (valueToFind == array[i]) {
                 return i;
             }
         }
         return INDEX_NOT_FOUND;
     }
 
     /**
      * <p>Checks if the value is in the given array.</p>
      *
      * <p>The method returns {@code false} if a {@code null} array is passed in.</p>
      *
      * @param array  the array to search through
      * @param valueToFind  the value to find
      * @return {@code true} if the array contains the object
      */
     public static boolean contains(final byte[] array, final byte valueToFind) {
         return indexOf(array, valueToFind) != INDEX_NOT_FOUND;
     }
 
     // double IndexOf
     //-----------------------------------------------------------------------
     /**
      * <p>Finds the index of the given value in the array.</p>
      *
      * <p>This method returns {@link #INDEX_NOT_FOUND} ({@code -1}) for a {@code null} input array.</p>
      *
      * @param array  the array to search through for the object, may be {@code null}
      * @param valueToFind  the value to find
      * @return the index of the value within the array,
      *  {@link #INDEX_NOT_FOUND} ({@code -1}) if not found or {@code null} array input
      */
     public static int indexOf(final double[] array, final double valueToFind) {
         return indexOf(array, valueToFind, 0);
     }
 
     /**
      * <p>Finds the index of the given value within a given tolerance in the array.
      * This method will return the index of the first value which falls between the region
      * defined by valueToFind - tolerance and valueToFind + tolerance.</p>
      *
      * <p>This method returns {@link #INDEX_NOT_FOUND} ({@code -1}) for a {@code null} input array.</p>
      *
      * @param array  the array to search through for the object, may be {@code null}
      * @param valueToFind  the value to find
      * @param tolerance tolerance of the search
      * @return the index of the value within the array,
      *  {@link #INDEX_NOT_FOUND} ({@code -1}) if not found or {@code null} array input
      */
     public static int indexOf(final double[] array, final double valueToFind, final double tolerance) {
         return indexOf(array, valueToFind, 0, tolerance);
     }
 
     /**
      * <p>Finds the index of the given value in the array starting at the given index.</p>
      *
      * <p>This method returns {@link #INDEX_NOT_FOUND} ({@code -1}) for a {@code null} input array.</p>
      *
      * <p>A negative startIndex is treated as zero. A startIndex larger than the array
      * length will return {@link #INDEX_NOT_FOUND} ({@code -1}).</p>
      *
      * @param array  the array to search through for the object, may be {@code null}
      * @param valueToFind  the value to find
      * @param startIndex  the index to start searching at
      * @return the index of the value within the array,
      *  {@link #INDEX_NOT_FOUND} ({@code -1}) if not found or {@code null} array input
      */
     public static int indexOf(final double[] array, final double valueToFind, int startIndex) {
         if (ArrayUtils.isEmpty(array)) {
             return INDEX_NOT_FOUND;
         }
         if (startIndex < 0) {
             startIndex = 0;
         }
         for (int i = startIndex; i < array.length; i++) {
             if (valueToFind == array[i]) {
                 return i;
             }
         }
         return INDEX_NOT_FOUND;
     }
 
     /**
      * <p>Finds the index of the given value in the array starting at the given index.
      * This method will return the index of the first value which falls between the region
      * defined by valueToFind - tolerance and valueToFind + tolerance.</p>
      *
      * <p>This method returns {@link #INDEX_NOT_FOUND} ({@code -1}) for a {@code null} input array.</p>
      *
      * <p>A negative startIndex is treated as zero. A startIndex larger than the array
      * length will return {@link #INDEX_NOT_FOUND} ({@code -1}).</p>
      *
      * @param array  the array to search through for the object, may be {@code null}
      * @param valueToFind  the value to find
      * @param startIndex  the index to start searching at
      * @param tolerance tolerance of the search
      * @return the index of the value within the array,
      *  {@link #INDEX_NOT_FOUND} ({@code -1}) if not found or {@code null} array input
      */
     public static int indexOf(final double[] array, final double valueToFind, int startIndex, final double tolerance) {
         if (ArrayUtils.isEmpty(array)) {
             return INDEX_NOT_FOUND;
         }
         if (startIndex < 0) {
             startIndex = 0;
         }
         final double min = valueToFind - tolerance;
         final double max = valueToFind + tolerance;
         for (int i = startIndex; i < array.length; i++) {
             if (array[i] >= min && array[i] <= max) {
                 return i;
             }
         }
         return INDEX_NOT_FOUND;
     }
 
     /**
      * <p>Finds the last index of the given value within the array.</p>
      *
      * <p>This method returns {@link #INDEX_NOT_FOUND} ({@code -1}) for a {@code null} input array.</p>
      *
      * @param array  the array to travers backwords looking for the object, may be {@code null}
      * @param valueToFind  the object to find
      * @return the last index of the value within the array,
      *  {@link #INDEX_NOT_FOUND} ({@code -1}) if not found or {@code null} array input
      */
     public static int lastIndexOf(final double[] array, final double valueToFind) {
         return lastIndexOf(array, valueToFind, Integer.MAX_VALUE);
     }
 
     /**
      * <p>Finds the last index of the given value within a given tolerance in the array.
      * This method will return the index of the last value which falls between the region
      * defined by valueToFind - tolerance and valueToFind + tolerance.</p>
      *
      * <p>This method returns {@link #INDEX_NOT_FOUND} ({@code -1}) for a {@code null} input array.</p>
      *
      * @param array  the array to search through for the object, may be {@code null}
      * @param valueToFind  the value to find
      * @param tolerance tolerance of the search
      * @return the index of the value within the array,
      *  {@link #INDEX_NOT_FOUND} ({@code -1}) if not found or {@code null} array input
      */
     public static int lastIndexOf(final double[] array, final double valueToFind, final double tolerance) {
         return lastIndexOf(array, valueToFind, Integer.MAX_VALUE, tolerance);
     }
 
     /**
      * <p>Finds the last index of the given value in the array starting at the given index.</p>
      *
      * <p>This method returns {@link #INDEX_NOT_FOUND} ({@code -1}) for a {@code null} input array.</p>
      *
      * <p>A negative startIndex will return {@link #INDEX_NOT_FOUND} ({@code -1}). A startIndex larger than the
      * array length will search from the end of the array.</p>
      *
      * @param array  the array to traverse for looking for the object, may be {@code null}
      * @param valueToFind  the value to find
      * @param startIndex  the start index to travers backwards from
      * @return the last index of the value within the array,
      *  {@link #INDEX_NOT_FOUND} ({@code -1}) if not found or {@code null} array input
      */
     public static int lastIndexOf(final double[] array, final double valueToFind, int startIndex) {
         if (ArrayUtils.isEmpty(array)) {
             return INDEX_NOT_FOUND;
         }
         if (startIndex < 0) {
             return INDEX_NOT_FOUND;
         } else if (startIndex >= array.length) {
             startIndex = array.length - 1;
         }
         for (int i = startIndex; i >= 0; i--) {
             if (valueToFind == array[i]) {
                 return i;
             }
         }
         return INDEX_NOT_FOUND;
     }
 
     /**
      * <p>Finds the last index of the given value in the array starting at the given index.
      * This method will return the index of the last value which falls between the region
      * defined by valueToFind - tolerance and valueToFind + tolerance.</p>
      *
      * <p>This method returns {@link #INDEX_NOT_FOUND} ({@code -1}) for a {@code null} input array.</p>
      *
      * <p>A negative startIndex will return {@link #INDEX_NOT_FOUND} ({@code -1}). A startIndex larger than the
      * array length will search from the end of the array.</p>
      *
      * @param array  the array to traverse for looking for the object, may be {@code null}
      * @param valueToFind  the value to find
      * @param startIndex  the start index to travers backwards from
      * @param tolerance  search for value within plus/minus this amount
      * @return the last index of the value within the array,
      *  {@link #INDEX_NOT_FOUND} ({@code -1}) if not found or {@code null} array input
      */
     public static int lastIndexOf(final double[] array, final double valueToFind, int startIndex, final double tolerance) {
         if (ArrayUtils.isEmpty(array)) {
             return INDEX_NOT_FOUND;
         }
         if (startIndex < 0) {
             return INDEX_NOT_FOUND;
         } else if (startIndex >= array.length) {
             startIndex = array.length - 1;
         }
         final double min = valueToFind - tolerance;
         final double max = valueToFind + tolerance;
         for (int i = startIndex; i >= 0; i--) {
             if (array[i] >= min && array[i] <= max) {
                 return i;
             }
         }
         return INDEX_NOT_FOUND;
     }
 
     /**
      * <p>Checks if the value is in the given array.</p>
      *
      * <p>The method returns {@code false} if a {@code null} array is passed in.</p>
      *
      * @param array  the array to search through
      * @param valueToFind  the value to find
      * @return {@code true} if the array contains the object
      */
     public static boolean contains(final double[] array, final double valueToFind) {
         return indexOf(array, valueToFind) != INDEX_NOT_FOUND;
     }
 
     /**
      * <p>Checks if a value falling within the given tolerance is in the
      * given array.  If the array contains a value within the inclusive range
      * defined by (value - tolerance) to (value + tolerance).</p>
      *
      * <p>The method returns {@code false} if a {@code null} array
      * is passed in.</p>
      *
      * @param array  the array to search
      * @param valueToFind  the value to find
      * @param tolerance  the array contains the tolerance of the search
      * @return true if value falling within tolerance is in array
      */
     public static boolean contains(final double[] array, final double valueToFind, final double tolerance) {
         return indexOf(array, valueToFind, 0, tolerance) != INDEX_NOT_FOUND;
     }
 
     // float IndexOf
     //-----------------------------------------------------------------------
     /**
      * <p>Finds the index of the given value in the array.</p>
      *
      * <p>This method returns {@link #INDEX_NOT_FOUND} ({@code -1}) for a {@code null} input array.</p>
      *
      * @param array  the array to search through for the object, may be {@code null}
      * @param valueToFind  the value to find
      * @return the index of the value within the array,
      *  {@link #INDEX_NOT_FOUND} ({@code -1}) if not found or {@code null} array input
      */
     public static int indexOf(final float[] array, final float valueToFind) {
         return indexOf(array, valueToFind, 0);
     }
 
     /**
      * <p>Finds the index of the given value in the array starting at the given index.</p>
      *
      * <p>This method returns {@link #INDEX_NOT_FOUND} ({@code -1}) for a {@code null} input array.</p>
      *
      * <p>A negative startIndex is treated as zero. A startIndex larger than the array
      * length will return {@link #INDEX_NOT_FOUND} ({@code -1}).</p>
      *
      * @param array  the array to search through for the object, may be {@code null}
      * @param valueToFind  the value to find
      * @param startIndex  the index to start searching at
      * @return the index of the value within the array,
      *  {@link #INDEX_NOT_FOUND} ({@code -1}) if not found or {@code null} array input
      */
     public static int indexOf(final float[] array, final float valueToFind, int startIndex) {
         if (ArrayUtils.isEmpty(array)) {
             return INDEX_NOT_FOUND;
         }
         if (startIndex < 0) {
             startIndex = 0;
         }
         for (int i = startIndex; i < array.length; i++) {
             if (valueToFind == array[i]) {
                 return i;
             }
         }
         return INDEX_NOT_FOUND;
     }
 
     /**
      * <p>Finds the last index of the given value within the array.</p>
      *
      * <p>This method returns {@link #INDEX_NOT_FOUND} ({@code -1}) for a {@code null} input array.</p>
      *
      * @param array  the array to travers backwords looking for the object, may be {@code null}
      * @param valueToFind  the object to find
      * @return the last index of the value within the array,
      *  {@link #INDEX_NOT_FOUND} ({@code -1}) if not found or {@code null} array input
      */
     public static int lastIndexOf(final float[] array, final float valueToFind) {
         return lastIndexOf(array, valueToFind, Integer.MAX_VALUE);
     }
 
     /**
      * <p>Finds the last index of the given value in the array starting at the given index.</p>
      *
      * <p>This method returns {@link #INDEX_NOT_FOUND} ({@code -1}) for a {@code null} input array.</p>
      *
      * <p>A negative startIndex will return {@link #INDEX_NOT_FOUND} ({@code -1}). A startIndex larger than the
      * array length will search from the end of the array.</p>
      *
      * @param array  the array to traverse for looking for the object, may be {@code null}
      * @param valueToFind  the value to find
      * @param startIndex  the start index to travers backwards from
      * @return the last index of the value within the array,
      *  {@link #INDEX_NOT_FOUND} ({@code -1}) if not found or {@code null} array input
      */
     public static int lastIndexOf(final float[] array, final float valueToFind, int startIndex) {
         if (ArrayUtils.isEmpty(array)) {
             return INDEX_NOT_FOUND;
         }
         if (startIndex < 0) {
             return INDEX_NOT_FOUND;
         } else if (startIndex >= array.length) {
             startIndex = array.length - 1;
         }
         for (int i = startIndex; i >= 0; i--) {
             if (valueToFind == array[i]) {
                 return i;
             }
         }
         return INDEX_NOT_FOUND;
     }
 
     /**
      * <p>Checks if the value is in the given array.</p>
      *
      * <p>The method returns {@code false} if a {@code null} array is passed in.</p>
      *
      * @param array  the array to search through
      * @param valueToFind  the value to find
      * @return {@code true} if the array contains the object
      */
     public static boolean contains(final float[] array, final float valueToFind) {
         return indexOf(array, valueToFind) != INDEX_NOT_FOUND;
     }
 
     // boolean IndexOf
     //-----------------------------------------------------------------------
     /**
      * <p>Finds the index of the given value in the array.</p>
      *
      * <p>This method returns {@link #INDEX_NOT_FOUND} ({@code -1}) for a {@code null} input array.</p>
      *
      * @param array  the array to search through for the object, may be {@code null}
      * @param valueToFind  the value to find
      * @return the index of the value within the array,
      *  {@link #INDEX_NOT_FOUND} ({@code -1}) if not found or {@code null} array input
      */
     public static int indexOf(final boolean[] array, final boolean valueToFind) {
         return indexOf(array, valueToFind, 0);
     }
 
     /**
      * <p>Finds the index of the given value in the array starting at the given index.</p>
      *
      * <p>This method returns {@link #INDEX_NOT_FOUND} ({@code -1}) for a {@code null} input array.</p>
      *
      * <p>A negative startIndex is treated as zero. A startIndex larger than the array
      * length will return {@link #INDEX_NOT_FOUND} ({@code -1}).</p>
      *
      * @param array  the array to search through for the object, may be {@code null}
      * @param valueToFind  the value to find
      * @param startIndex  the index to start searching at
      * @return the index of the value within the array,
      *  {@link #INDEX_NOT_FOUND} ({@code -1}) if not found or {@code null}
      *  array input
      */
     public static int indexOf(final boolean[] array, final boolean valueToFind, int startIndex) {
         if (ArrayUtils.isEmpty(array)) {
             return INDEX_NOT_FOUND;
         }
         if (startIndex < 0) {
             startIndex = 0;
         }
         for (int i = startIndex; i < array.length; i++) {
             if (valueToFind == array[i]) {
                 return i;
             }
         }
         return INDEX_NOT_FOUND;
     }
 
     /**
      * <p>Finds the last index of the given value within the array.</p>
      *
      * <p>This method returns {@link #INDEX_NOT_FOUND} ({@code -1}) if
      * {@code null} array input.</p>
      *
      * @param array  the array to travers backwords looking for the object, may be {@code null}
      * @param valueToFind  the object to find
      * @return the last index of the value within the array,
      *  {@link #INDEX_NOT_FOUND} ({@code -1}) if not found or {@code null} array input
      */
     public static int lastIndexOf(final boolean[] array, final boolean valueToFind) {
         return lastIndexOf(array, valueToFind, Integer.MAX_VALUE);
     }
 
     /**
      * <p>Finds the last index of the given value in the array starting at the given index.</p>
      *
      * <p>This method returns {@link #INDEX_NOT_FOUND} ({@code -1}) for a {@code null} input array.</p>
      *
      * <p>A negative startIndex will return {@link #INDEX_NOT_FOUND} ({@code -1}). A startIndex larger than
      * the array length will search from the end of the array.</p>
      *
      * @param array  the array to traverse for looking for the object, may be {@code null}
      * @param valueToFind  the value to find
      * @param startIndex  the start index to travers backwards from
      * @return the last index of the value within the array,
      *  {@link #INDEX_NOT_FOUND} ({@code -1}) if not found or {@code null} array input
      */
     public static int lastIndexOf(final boolean[] array, final boolean valueToFind, int startIndex) {
         if (ArrayUtils.isEmpty(array)) {
             return INDEX_NOT_FOUND;
         }
         if (startIndex < 0) {
             return INDEX_NOT_FOUND;
         } else if (startIndex >= array.length) {
             startIndex = array.length - 1;
         }
         for (int i = startIndex; i >= 0; i--) {
             if (valueToFind == array[i]) {
                 return i;
             }
         }
         return INDEX_NOT_FOUND;
     }
 
     /**
      * <p>Checks if the value is in the given array.</p>
      *
      * <p>The method returns {@code false} if a {@code null} array is passed in.</p>
      *
      * @param array  the array to search through
      * @param valueToFind  the value to find
      * @return {@code true} if the array contains the object
      */
     public static boolean contains(final boolean[] array, final boolean valueToFind) {
         return indexOf(array, valueToFind) != INDEX_NOT_FOUND;
     }
 
     // Primitive/Object array converters
     // ----------------------------------------------------------------------
 
     // Character array converters
     // ----------------------------------------------------------------------
     /**
      * <p>Converts an array of object Characters to primitives.</p>
      *
      * <p>This method returns {@code null} for a {@code null} input array.</p>
      *
      * @param array  a {@code Character} array, may be {@code null}
      * @return a {@code char} array, {@code null} if null array input
      * @throws NullPointerException if array content is {@code null}
      */
     public static char[] toPrimitive(final Character[] array) {
         if (array == null) {
             return null;
         } else if (array.length == 0) {
             return EMPTY_CHAR_ARRAY;
         }
         final char[] result = new char[array.length];
         for (int i = 0; i < array.length; i++) {
             result[i] = array[i].charValue();
         }
         return result;
     }
 
     /**
      * <p>Converts an array of object Character to primitives handling {@code null}.</p>
      *
      * <p>This method returns {@code null} for a {@code null} input array.</p>
      *
      * @param array  a {@code Character} array, may be {@code null}
      * @param valueForNull  the value to insert if {@code null} found
      * @return a {@code char} array, {@code null} if null array input
      */
     public static char[] toPrimitive(final Character[] array, final char valueForNull) {
         if (array == null) {
             return null;
         } else if (array.length == 0) {
             return EMPTY_CHAR_ARRAY;
         }
         final char[] result = new char[array.length];
         for (int i = 0; i < array.length; i++) {
             final Character b = array[i];
             result[i] = (b == null ? valueForNull : b.charValue());
         }
         return result;
     }
 
     /**
      * <p>Converts an array of primitive chars to objects.</p>
      *
      * <p>This method returns {@code null} for a {@code null} input array.</p>
      *
      * @param array a {@code char} array
      * @return a {@code Character} array, {@code null} if null array input
      */
     public static Character[] toObject(final char[] array) {
         if (array == null) {
             return null;
         } else if (array.length == 0) {
             return EMPTY_CHARACTER_OBJECT_ARRAY;
         }
         final Character[] result = new Character[array.length];
         for (int i = 0; i < array.length; i++) {
             result[i] = Character.valueOf(array[i]);
         }
         return result;
      }
 
     // Long array converters
     // ----------------------------------------------------------------------
     /**
      * <p>Converts an array of object Longs to primitives.</p>
      *
      * <p>This method returns {@code null} for a {@code null} input array.</p>
      *
      * @param array  a {@code Long} array, may be {@code null}
      * @return a {@code long} array, {@code null} if null array input
      * @throws NullPointerException if array content is {@code null}
      */
     public static long[] toPrimitive(final Long[] array) {
         if (array == null) {
             return null;
         } else if (array.length == 0) {
             return EMPTY_LONG_ARRAY;
         }
         final long[] result = new long[array.length];
         for (int i = 0; i < array.length; i++) {
             result[i] = array[i].longValue();
         }
         return result;
     }
 
     /**
      * <p>Converts an array of object Long to primitives handling {@code null}.</p>
      *
      * <p>This method returns {@code null} for a {@code null} input array.</p>
      *
      * @param array  a {@code Long} array, may be {@code null}
      * @param valueForNull  the value to insert if {@code null} found
      * @return a {@code long} array, {@code null} if null array input
      */
     public static long[] toPrimitive(final Long[] array, final long valueForNull) {
         if (array == null) {
             return null;
         } else if (array.length == 0) {
             return EMPTY_LONG_ARRAY;
         }
         final long[] result = new long[array.length];
         for (int i = 0; i < array.length; i++) {
             final Long b = array[i];
             result[i] = (b == null ? valueForNull : b.longValue());
         }
         return result;
     }
 
     /**
      * <p>Converts an array of primitive longs to objects.</p>
      *
      * <p>This method returns {@code null} for a {@code null} input array.</p>
      *
      * @param array  a {@code long} array
      * @return a {@code Long} array, {@code null} if null array input
      */
     public static Long[] toObject(final long[] array) {
         if (array == null) {
             return null;
         } else if (array.length == 0) {
             return EMPTY_LONG_OBJECT_ARRAY;
         }
         final Long[] result = new Long[array.length];
         for (int i = 0; i < array.length; i++) {
             result[i] = Long.valueOf(array[i]);
         }
         return result;
     }
 
     // Int array converters
     // ----------------------------------------------------------------------
     /**
      * <p>Converts an array of object Integers to primitives.</p>
      *
      * <p>This method returns {@code null} for a {@code null} input array.</p>
      *
      * @param array  a {@code Integer} array, may be {@code null}
      * @return an {@code int} array, {@code null} if null array input
      * @throws NullPointerException if array content is {@code null}
      */
     public static int[] toPrimitive(final Integer[] array) {
         if (array == null) {
             return null;
         } else if (array.length == 0) {
             return EMPTY_INT_ARRAY;
         }
         final int[] result = new int[array.length];
         for (int i = 0; i < array.length; i++) {
             result[i] = array[i].intValue();
         }
         return result;
     }
 
     /**
      * <p>Converts an array of object Integer to primitives handling {@code null}.</p>
      *
      * <p>This method returns {@code null} for a {@code null} input array.</p>
      *
      * @param array  a {@code Integer} array, may be {@code null}
      * @param valueForNull  the value to insert if {@code null} found
      * @return an {@code int} array, {@code null} if null array input
      */
     public static int[] toPrimitive(final Integer[] array, final int valueForNull) {
         if (array == null) {
             return null;
         } else if (array.length == 0) {
             return EMPTY_INT_ARRAY;
         }
         final int[] result = new int[array.length];
         for (int i = 0; i < array.length; i++) {
             final Integer b = array[i];
             result[i] = (b == null ? valueForNull : b.intValue());
         }
         return result;
     }
 
     /**
      * <p>Converts an array of primitive ints to objects.</p>
      *
      * <p>This method returns {@code null} for a {@code null} input array.</p>
      *
      * @param array  an {@code int} array
      * @return an {@code Integer} array, {@code null} if null array input
      */
     public static Integer[] toObject(final int[] array) {
         if (array == null) {
             return null;
         } else if (array.length == 0) {
             return EMPTY_INTEGER_OBJECT_ARRAY;
         }
         final Integer[] result = new Integer[array.length];
         for (int i = 0; i < array.length; i++) {
             result[i] = Integer.valueOf(array[i]);
         }
         return result;
     }
 
     // Short array converters
     // ----------------------------------------------------------------------
     /**
      * <p>Converts an array of object Shorts to primitives.</p>
      *
      * <p>This method returns {@code null} for a {@code null} input array.</p>
      *
      * @param array  a {@code Short} array, may be {@code null}
      * @return a {@code byte} array, {@code null} if null array input
      * @throws NullPointerException if array content is {@code null}
      */
     public static short[] toPrimitive(final Short[] array) {
         if (array == null) {
             return null;
         } else if (array.length == 0) {
             return EMPTY_SHORT_ARRAY;
         }
         final short[] result = new short[array.length];
         for (int i = 0; i < array.length; i++) {
             result[i] = array[i].shortValue();
         }
         return result;
     }
 
     /**
      * <p>Converts an array of object Short to primitives handling {@code null}.</p>
      *
      * <p>This method returns {@code null} for a {@code null} input array.</p>
      *
      * @param array  a {@code Short} array, may be {@code null}
      * @param valueForNull  the value to insert if {@code null} found
      * @return a {@code byte} array, {@code null} if null array input
      */
     public static short[] toPrimitive(final Short[] array, final short valueForNull) {
         if (array == null) {
             return null;
         } else if (array.length == 0) {
             return EMPTY_SHORT_ARRAY;
         }
         final short[] result = new short[array.length];
         for (int i = 0; i < array.length; i++) {
             final Short b = array[i];
             result[i] = (b == null ? valueForNull : b.shortValue());
         }
         return result;
     }
 
     /**
      * <p>Converts an array of primitive shorts to objects.</p>
      *
      * <p>This method returns {@code null} for a {@code null} input array.</p>
      *
      * @param array  a {@code short} array
      * @return a {@code Short} array, {@code null} if null array input
      */
     public static Short[] toObject(final short[] array) {
         if (array == null) {
             return null;
         } else if (array.length == 0) {
             return EMPTY_SHORT_OBJECT_ARRAY;
         }
         final Short[] result = new Short[array.length];
         for (int i = 0; i < array.length; i++) {
             result[i] = Short.valueOf(array[i]);
         }
         return result;
     }
 
     // Byte array converters
     // ----------------------------------------------------------------------
     /**
      * <p>Converts an array of object Bytes to primitives.</p>
      *
      * <p>This method returns {@code null} for a {@code null} input array.</p>
      *
      * @param array  a {@code Byte} array, may be {@code null}
      * @return a {@code byte} array, {@code null} if null array input
      * @throws NullPointerException if array content is {@code null}
      */
     public static byte[] toPrimitive(final Byte[] array) {
         if (array == null) {
             return null;
         } else if (array.length == 0) {
             return EMPTY_BYTE_ARRAY;
         }
         final byte[] result = new byte[array.length];
         for (int i = 0; i < array.length; i++) {
             result[i] = array[i].byteValue();
         }
         return result;
     }
 
     /**
      * <p>Converts an array of object Bytes to primitives handling {@code null}.</p>
      *
      * <p>This method returns {@code null} for a {@code null} input array.</p>
      *
      * @param array  a {@code Byte} array, may be {@code null}
      * @param valueForNull  the value to insert if {@code null} found
      * @return a {@code byte} array, {@code null} if null array input
      */
     public static byte[] toPrimitive(final Byte[] array, final byte valueForNull) {
         if (array == null) {
             return null;
         } else if (array.length == 0) {
             return EMPTY_BYTE_ARRAY;
         }
         final byte[] result = new byte[array.length];
         for (int i = 0; i < array.length; i++) {
             final Byte b = array[i];
             result[i] = (b == null ? valueForNull : b.byteValue());
         }
         return result;
     }
 
     /**
      * <p>Converts an array of primitive bytes to objects.</p>
      *
      * <p>This method returns {@code null} for a {@code null} input array.</p>
      *
      * @param array  a {@code byte} array
      * @return a {@code Byte} array, {@code null} if null array input
      */
     public static Byte[] toObject(final byte[] array) {
         if (array == null) {
             return null;
         } else if (array.length == 0) {
             return EMPTY_BYTE_OBJECT_ARRAY;
         }
         final Byte[] result = new Byte[array.length];
         for (int i = 0; i < array.length; i++) {
             result[i] = Byte.valueOf(array[i]);
         }
         return result;
     }
 
     // Double array converters
     // ----------------------------------------------------------------------
     /**
      * <p>Converts an array of object Doubles to primitives.</p>
      *
      * <p>This method returns {@code null} for a {@code null} input array.</p>
      *
      * @param array  a {@code Double} array, may be {@code null}
      * @return a {@code double} array, {@code null} if null array input
      * @throws NullPointerException if array content is {@code null}
      */
     public static double[] toPrimitive(final Double[] array) {
         if (array == null) {
             return null;
         } else if (array.length == 0) {
             return EMPTY_DOUBLE_ARRAY;
         }
         final double[] result = new double[array.length];
         for (int i = 0; i < array.length; i++) {
             result[i] = array[i].doubleValue();
         }
         return result;
     }
 
     /**
      * <p>Converts an array of object Doubles to primitives handling {@code null}.</p>
      *
      * <p>This method returns {@code null} for a {@code null} input array.</p>
      *
      * @param array  a {@code Double} array, may be {@code null}
      * @param valueForNull  the value to insert if {@code null} found
      * @return a {@code double} array, {@code null} if null array input
      */
     public static double[] toPrimitive(final Double[] array, final double valueForNull) {
         if (array == null) {
             return null;
         } else if (array.length == 0) {
             return EMPTY_DOUBLE_ARRAY;
         }
         final double[] result = new double[array.length];
         for (int i = 0; i < array.length; i++) {
             final Double b = array[i];
             result[i] = (b == null ? valueForNull : b.doubleValue());
         }
         return result;
     }
 
     /**
      * <p>Converts an array of primitive doubles to objects.</p>
      *
      * <p>This method returns {@code null} for a {@code null} input array.</p>
      *
      * @param array  a {@code double} array
      * @return a {@code Double} array, {@code null} if null array input
      */
     public static Double[] toObject(final double[] array) {
         if (array == null) {
             return null;
         } else if (array.length == 0) {
             return EMPTY_DOUBLE_OBJECT_ARRAY;
         }
         final Double[] result = new Double[array.length];
         for (int i = 0; i < array.length; i++) {
             result[i] = Double.valueOf(array[i]);
         }
         return result;
     }
 
     //   Float array converters
     // ----------------------------------------------------------------------
     /**
      * <p>Converts an array of object Floats to primitives.</p>
      *
      * <p>This method returns {@code null} for a {@code null} input array.</p>
      *
      * @param array  a {@code Float} array, may be {@code null}
      * @return a {@code float} array, {@code null} if null array input
      * @throws NullPointerException if array content is {@code null}
      */
     public static float[] toPrimitive(final Float[] array) {
         if (array == null) {
             return null;
         } else if (array.length == 0) {
             return EMPTY_FLOAT_ARRAY;
         }
         final float[] result = new float[array.length];
         for (int i = 0; i < array.length; i++) {
             result[i] = array[i].floatValue();
         }
         return result;
     }
 
     /**
      * <p>Converts an array of object Floats to primitives handling {@code null}.</p>
      *
      * <p>This method returns {@code null} for a {@code null} input array.</p>
      *
      * @param array  a {@code Float} array, may be {@code null}
      * @param valueForNull  the value to insert if {@code null} found
      * @return a {@code float} array, {@code null} if null array input
      */
     public static float[] toPrimitive(final Float[] array, final float valueForNull) {
         if (array == null) {
             return null;
         } else if (array.length == 0) {
             return EMPTY_FLOAT_ARRAY;
         }
         final float[] result = new float[array.length];
         for (int i = 0; i < array.length; i++) {
             final Float b = array[i];
             result[i] = (b == null ? valueForNull : b.floatValue());
         }
         return result;
     }
 
     /**
      * <p>Converts an array of primitive floats to objects.</p>
      *
      * <p>This method returns {@code null} for a {@code null} input array.</p>
      *
      * @param array  a {@code float} array
      * @return a {@code Float} array, {@code null} if null array input
      */
     public static Float[] toObject(final float[] array) {
         if (array == null) {
             return null;
         } else if (array.length == 0) {
             return EMPTY_FLOAT_OBJECT_ARRAY;
         }
         final Float[] result = new Float[array.length];
         for (int i = 0; i < array.length; i++) {
             result[i] = Float.valueOf(array[i]);
         }
         return result;
     }
 
     // Boolean array converters
     // ----------------------------------------------------------------------
     /**
      * <p>Converts an array of object Booleans to primitives.</p>
      *
      * <p>This method returns {@code null} for a {@code null} input array.</p>
      *
      * @param array  a {@code Boolean} array, may be {@code null}
      * @return a {@code boolean} array, {@code null} if null array input
      * @throws NullPointerException if array content is {@code null}
      */
     public static boolean[] toPrimitive(final Boolean[] array) {
         if (array == null) {
             return null;
         } else if (array.length == 0) {
             return EMPTY_BOOLEAN_ARRAY;
         }
         final boolean[] result = new boolean[array.length];
         for (int i = 0; i < array.length; i++) {
             result[i] = array[i].booleanValue();
         }
         return result;
     }
 
     /**
      * <p>Converts an array of object Booleans to primitives handling {@code null}.</p>
      *
      * <p>This method returns {@code null} for a {@code null} input array.</p>
      *
      * @param array  a {@code Boolean} array, may be {@code null}
      * @param valueForNull  the value to insert if {@code null} found
      * @return a {@code boolean} array, {@code null} if null array input
      */
     public static boolean[] toPrimitive(final Boolean[] array, final boolean valueForNull) {
         if (array == null) {
             return null;
         } else if (array.length == 0) {
             return EMPTY_BOOLEAN_ARRAY;
         }
         final boolean[] result = new boolean[array.length];
         for (int i = 0; i < array.length; i++) {
             final Boolean b = array[i];
             result[i] = (b == null ? valueForNull : b.booleanValue());
         }
         return result;
     }
 
     /**
      * <p>Converts an array of primitive booleans to objects.</p>
      *
      * <p>This method returns {@code null} for a {@code null} input array.</p>
      *
      * @param array  a {@code boolean} array
      * @return a {@code Boolean} array, {@code null} if null array input
      */
     public static Boolean[] toObject(final boolean[] array) {
         if (array == null) {
             return null;
         } else if (array.length == 0) {
             return EMPTY_BOOLEAN_OBJECT_ARRAY;
         }
         final Boolean[] result = new Boolean[array.length];
         for (int i = 0; i < array.length; i++) {
             result[i] = (array[i] ? Boolean.TRUE : Boolean.FALSE);
         }
         return result;
     }
 
     // ----------------------------------------------------------------------
     /**
      * <p>Checks if an array of Objects is empty or {@code null}.</p>
      *
      * @param array  the array to test
      * @return {@code true} if the array is empty or {@code null}
      * @since 2.1
      */
     public static boolean isEmpty(final Object[] array) {
         return array == null || array.length == 0;
     }
 
     /**
      * <p>Checks if an array of primitive longs is empty or {@code null}.</p>
      *
      * @param array  the array to test
      * @return {@code true} if the array is empty or {@code null}
      * @since 2.1
      */
     public static boolean isEmpty(final long[] array) {
         return array == null || array.length == 0;
     }
 
     /**
      * <p>Checks if an array of primitive ints is empty or {@code null}.</p>
      *
      * @param array  the array to test
      * @return {@code true} if the array is empty or {@code null}
      * @since 2.1
      */
     public static boolean isEmpty(final int[] array) {
         return array == null || array.length == 0;
     }
 
     /**
      * <p>Checks if an array of primitive shorts is empty or {@code null}.</p>
      *
      * @param array  the array to test
      * @return {@code true} if the array is empty or {@code null}
      * @since 2.1
      */
     public static boolean isEmpty(final short[] array) {
         return array == null || array.length == 0;
     }
 
     /**
      * <p>Checks if an array of primitive chars is empty or {@code null}.</p>
      *
      * @param array  the array to test
      * @return {@code true} if the array is empty or {@code null}
      * @since 2.1
      */
     public static boolean isEmpty(final char[] array) {
         return array == null || array.length == 0;
     }
 
     /**
      * <p>Checks if an array of primitive bytes is empty or {@code null}.</p>
      *
      * @param array  the array to test
      * @return {@code true} if the array is empty or {@code null}
      * @since 2.1
      */
     public static boolean isEmpty(final byte[] array) {
         return array == null || array.length == 0;
     }
 
     /**
      * <p>Checks if an array of primitive doubles is empty or {@code null}.</p>
      *
      * @param array  the array to test
      * @return {@code true} if the array is empty or {@code null}
      * @since 2.1
      */
     public static boolean isEmpty(final double[] array) {
         return array == null || array.length == 0;
     }
 
     /**
      * <p>Checks if an array of primitive floats is empty or {@code null}.</p>
      *
      * @param array  the array to test
      * @return {@code true} if the array is empty or {@code null}
      * @since 2.1
      */
     public static boolean isEmpty(final float[] array) {
         return array == null || array.length == 0;
     }
 
     /**
      * <p>Checks if an array of primitive booleans is empty or {@code null}.</p>
      *
      * @param array  the array to test
      * @return {@code true} if the array is empty or {@code null}
      * @since 2.1
      */
     public static boolean isEmpty(final boolean[] array) {
         return array == null || array.length == 0;
     }
 
     // ----------------------------------------------------------------------
     /**
      * <p>Checks if an array of Objects is not empty or not {@code null}.</p>
      *
      * @param <T> the component type of the array
      * @param array  the array to test
      * @return {@code true} if the array is not empty or not {@code null}
      * @since 2.5
      */
      public static <T> boolean isNotEmpty(final T[] array) {
          return (array != null && array.length != 0);
      }
 
     /**
      * <p>Checks if an array of primitive longs is not empty or not {@code null}.</p>
      *
      * @param array  the array to test
      * @return {@code true} if the array is not empty or not {@code null}
      * @since 2.5
      */
     public static boolean isNotEmpty(final long[] array) {
         return (array != null && array.length != 0);
     }
 
     /**
      * <p>Checks if an array of primitive ints is not empty or not {@code null}.</p>
      *
      * @param array  the array to test
      * @return {@code true} if the array is not empty or not {@code null}
      * @since 2.5
      */
     public static boolean isNotEmpty(final int[] array) {
         return (array != null && array.length != 0);
     }
 
     /**
      * <p>Checks if an array of primitive shorts is not empty or not {@code null}.</p>
      *
      * @param array  the array to test
      * @return {@code true} if the array is not empty or not {@code null}
      * @since 2.5
      */
     public static boolean isNotEmpty(final short[] array) {
         return (array != null && array.length != 0);
     }
 
     /**
      * <p>Checks if an array of primitive chars is not empty or not {@code null}.</p>
      *
      * @param array  the array to test
      * @return {@code true} if the array is not empty or not {@code null}
      * @since 2.5
      */
     public static boolean isNotEmpty(final char[] array) {
         return (array != null && array.length != 0);
     }
 
     /**
      * <p>Checks if an array of primitive bytes is not empty or not {@code null}.</p>
      *
      * @param array  the array to test
      * @return {@code true} if the array is not empty or not {@code null}
      * @since 2.5
      */
     public static boolean isNotEmpty(final byte[] array) {
         return (array != null && array.length != 0);
     }
 
     /**
      * <p>Checks if an array of primitive doubles is not empty or not {@code null}.</p>
      *
      * @param array  the array to test
      * @return {@code true} if the array is not empty or not {@code null}
      * @since 2.5
      */
     public static boolean isNotEmpty(final double[] array) {
         return (array != null && array.length != 0);
     }
 
     /**
      * <p>Checks if an array of primitive floats is not empty or not {@code null}.</p>
      *
      * @param array  the array to test
      * @return {@code true} if the array is not empty or not {@code null}
      * @since 2.5
      */
     public static boolean isNotEmpty(final float[] array) {
         return (array != null && array.length != 0);
     }
 
     /**
      * <p>Checks if an array of primitive booleans is not empty or not {@code null}.</p>
      *
      * @param array  the array to test
      * @return {@code true} if the array is not empty or not {@code null}
      * @since 2.5
      */
     public static boolean isNotEmpty(final boolean[] array) {
         return (array != null && array.length != 0);
     }
 
     /**
      * <p>Adds all the elements of the given arrays into a new array.</p>
      * <p>The new array contains all of the element of {@code array1} followed
      * by all of the elements {@code array2}. When an array is returned, it is always
      * a new array.</p>
      *
      * <pre>
      * ArrayUtils.addAll(null, null)     = null
      * ArrayUtils.addAll(array1, null)   = cloned copy of array1
      * ArrayUtils.addAll(null, array2)   = cloned copy of array2
      * ArrayUtils.addAll([], [])         = []
      * ArrayUtils.addAll([null], [null]) = [null, null]
      * ArrayUtils.addAll(["a", "b", "c"], ["1", "2", "3"]) = ["a", "b", "c", "1", "2", "3"]
      * </pre>
      *
      * @param <T> the component type of the array
      * @param array1  the first array whose elements are added to the new array, may be {@code null}
      * @param array2  the second array whose elements are added to the new array, may be {@code null}
      * @return The new array, {@code null} if both arrays are {@code null}.
      *      The type of the new array is the type of the first array,
      *      unless the first array is null, in which case the type is the same as the second array.
      * @since 2.1
      * @throws IllegalArgumentException if the array types are incompatible
      */
     public static <T> T[] addAll(final T[] array1, final T... array2) {
         if (array1 == null) {
             return clone(array2);
         } else if (array2 == null) {
             return clone(array1);
         }
         final Class<?> type1 = array1.getClass().getComponentType();
         @SuppressWarnings("unchecked") // OK, because array is of type T
         final
         T[] joinedArray = (T[]) Array.newInstance(type1, array1.length + array2.length);
         System.arraycopy(array1, 0, joinedArray, 0, array1.length);
         try {
             System.arraycopy(array2, 0, joinedArray, array1.length, array2.length);
         } catch (final ArrayStoreException ase) {
             // Check if problem was due to incompatible types
             /*
              * We do this here, rather than before the copy because:
              * - it would be a wasted check most of the time
              * - safer, in case check turns out to be too strict
              */
             final Class<?> type2 = array2.getClass().getComponentType();
             if (!type1.isAssignableFrom(type2)){
                 throw new IllegalArgumentException("Cannot store "+type2.getName()+" in an array of "
                         +type1.getName(), ase);
             }
             throw ase; // No, so rethrow original
         }
         return joinedArray;
     }
 
     /**
      * <p>Adds all the elements of the given arrays into a new array.</p>
      * <p>The new array contains all of the element of {@code array1} followed
      * by all of the elements {@code array2}. When an array is returned, it is always
      * a new array.</p>
      *
      * <pre>
      * ArrayUtils.addAll(array1, null)   = cloned copy of array1
      * ArrayUtils.addAll(null, array2)   = cloned copy of array2
      * ArrayUtils.addAll([], [])         = []
      * </pre>
      *
      * @param array1  the first array whose elements are added to the new array.
      * @param array2  the second array whose elements are added to the new array.
      * @return The new boolean[] array.
      * @since 2.1
      */
     public static boolean[] addAll(final boolean[] array1, final boolean... array2) {
         if (array1 == null) {
             return clone(array2);
         } else if (array2 == null) {
             return clone(array1);
         }
         final boolean[] joinedArray = new boolean[array1.length + array2.length];
         System.arraycopy(array1, 0, joinedArray, 0, array1.length);
         System.arraycopy(array2, 0, joinedArray, array1.length, array2.length);
         return joinedArray;
     }
 
     /**
      * <p>Adds all the elements of the given arrays into a new array.</p>
      * <p>The new array contains all of the element of {@code array1} followed
      * by all of the elements {@code array2}. When an array is returned, it is always
      * a new array.</p>
      *
      * <pre>
      * ArrayUtils.addAll(array1, null)   = cloned copy of array1
      * ArrayUtils.addAll(null, array2)   = cloned copy of array2
      * ArrayUtils.addAll([], [])         = []
      * </pre>
      *
      * @param array1  the first array whose elements are added to the new array.
      * @param array2  the second array whose elements are added to the new array.
      * @return The new char[] array.
      * @since 2.1
      */
     public static char[] addAll(final char[] array1, final char... array2) {
         if (array1 == null) {
             return clone(array2);
         } else if (array2 == null) {
             return clone(array1);
         }
         final char[] joinedArray = new char[array1.length + array2.length];
         System.arraycopy(array1, 0, joinedArray, 0, array1.length);
         System.arraycopy(array2, 0, joinedArray, array1.length, array2.length);
         return joinedArray;
     }
 
     /**
      * <p>Adds all the elements of the given arrays into a new array.</p>
      * <p>The new array contains all of the element of {@code array1} followed
      * by all of the elements {@code array2}. When an array is returned, it is always
      * a new array.</p>
      *
      * <pre>
      * ArrayUtils.addAll(array1, null)   = cloned copy of array1
      * ArrayUtils.addAll(null, array2)   = cloned copy of array2
      * ArrayUtils.addAll([], [])         = []
      * </pre>
      *
      * @param array1  the first array whose elements are added to the new array.
      * @param array2  the second array whose elements are added to the new array.
      * @return The new byte[] array.
      * @since 2.1
      */
     public static byte[] addAll(final byte[] array1, final byte... array2) {
         if (array1 == null) {
             return clone(array2);
         } else if (array2 == null) {
             return clone(array1);
         }
         final byte[] joinedArray = new byte[array1.length + array2.length];
         System.arraycopy(array1, 0, joinedArray, 0, array1.length);
         System.arraycopy(array2, 0, joinedArray, array1.length, array2.length);
         return joinedArray;
     }
 
     /**
      * <p>Adds all the elements of the given arrays into a new array.</p>
      * <p>The new array contains all of the element of {@code array1} followed
      * by all of the elements {@code array2}. When an array is returned, it is always
      * a new array.</p>
      *
      * <pre>
      * ArrayUtils.addAll(array1, null)   = cloned copy of array1
      * ArrayUtils.addAll(null, array2)   = cloned copy of array2
      * ArrayUtils.addAll([], [])         = []
      * </pre>
      *
      * @param array1  the first array whose elements are added to the new array.
      * @param array2  the second array whose elements are added to the new array.
      * @return The new short[] array.
      * @since 2.1
      */
     public static short[] addAll(final short[] array1, final short... array2) {
         if (array1 == null) {
             return clone(array2);
         } else if (array2 == null) {
             return clone(array1);
         }
         final short[] joinedArray = new short[array1.length + array2.length];
         System.arraycopy(array1, 0, joinedArray, 0, array1.length);
         System.arraycopy(array2, 0, joinedArray, array1.length, array2.length);
         return joinedArray;
     }
 
     /**
      * <p>Adds all the elements of the given arrays into a new array.</p>
      * <p>The new array contains all of the element of {@code array1} followed
      * by all of the elements {@code array2}. When an array is returned, it is always
      * a new array.</p>
      *
      * <pre>
      * ArrayUtils.addAll(array1, null)   = cloned copy of array1
      * ArrayUtils.addAll(null, array2)   = cloned copy of array2
      * ArrayUtils.addAll([], [])         = []
      * </pre>
      *
      * @param array1  the first array whose elements are added to the new array.
      * @param array2  the second array whose elements are added to the new array.
      * @return The new int[] array.
      * @since 2.1
      */
     public static int[] addAll(final int[] array1, final int... array2) {
         if (array1 == null) {
             return clone(array2);
         } else if (array2 == null) {
             return clone(array1);
         }
         final int[] joinedArray = new int[array1.length + array2.length];
         System.arraycopy(array1, 0, joinedArray, 0, array1.length);
         System.arraycopy(array2, 0, joinedArray, array1.length, array2.length);
         return joinedArray;
     }
 
     /**
      * <p>Adds all the elements of the given arrays into a new array.</p>
      * <p>The new array contains all of the element of {@code array1} followed
      * by all of the elements {@code array2}. When an array is returned, it is always
      * a new array.</p>
      *
      * <pre>
      * ArrayUtils.addAll(array1, null)   = cloned copy of array1
      * ArrayUtils.addAll(null, array2)   = cloned copy of array2
      * ArrayUtils.addAll([], [])         = []
      * </pre>
      *
      * @param array1  the first array whose elements are added to the new array.
      * @param array2  the second array whose elements are added to the new array.
      * @return The new long[] array.
      * @since 2.1
      */
     public static long[] addAll(final long[] array1, final long... array2) {
         if (array1 == null) {
             return clone(array2);
         } else if (array2 == null) {
             return clone(array1);
         }
         final long[] joinedArray = new long[array1.length + array2.length];
         System.arraycopy(array1, 0, joinedArray, 0, array1.length);
         System.arraycopy(array2, 0, joinedArray, array1.length, array2.length);
         return joinedArray;
     }
 
     /**
      * <p>Adds all the elements of the given arrays into a new array.</p>
      * <p>The new array contains all of the element of {@code array1} followed
      * by all of the elements {@code array2}. When an array is returned, it is always
      * a new array.</p>
      *
      * <pre>
      * ArrayUtils.addAll(array1, null)   = cloned copy of array1
      * ArrayUtils.addAll(null, array2)   = cloned copy of array2
      * ArrayUtils.addAll([], [])         = []
      * </pre>
      *
      * @param array1  the first array whose elements are added to the new array.
      * @param array2  the second array whose elements are added to the new array.
      * @return The new float[] array.
      * @since 2.1
      */
     public static float[] addAll(final float[] array1, final float... array2) {
         if (array1 == null) {
             return clone(array2);
         } else if (array2 == null) {
             return clone(array1);
         }
         final float[] joinedArray = new float[array1.length + array2.length];
         System.arraycopy(array1, 0, joinedArray, 0, array1.length);
         System.arraycopy(array2, 0, joinedArray, array1.length, array2.length);
         return joinedArray;
     }
 
     /**
      * <p>Adds all the elements of the given arrays into a new array.</p>
      * <p>The new array contains all of the element of {@code array1} followed
      * by all of the elements {@code array2}. When an array is returned, it is always
      * a new array.</p>
      *
      * <pre>
      * ArrayUtils.addAll(array1, null)   = cloned copy of array1
      * ArrayUtils.addAll(null, array2)   = cloned copy of array2
      * ArrayUtils.addAll([], [])         = []
      * </pre>
      *
      * @param array1  the first array whose elements are added to the new array.
      * @param array2  the second array whose elements are added to the new array.
      * @return The new double[] array.
      * @since 2.1
      */
     public static double[] addAll(final double[] array1, final double... array2) {
         if (array1 == null) {
             return clone(array2);
         } else if (array2 == null) {
             return clone(array1);
         }
         final double[] joinedArray = new double[array1.length + array2.length];
         System.arraycopy(array1, 0, joinedArray, 0, array1.length);
         System.arraycopy(array2, 0, joinedArray, array1.length, array2.length);
         return joinedArray;
     }
 
     /**
      * <p>Copies the given array and adds the given element at the end of the new array.</p>
      *
      * <p>The new array contains the same elements of the input
      * array plus the given element in the last position. The component type of
      * the new array is the same as that of the input array.</p>
      *
      * <p>If the input array is {@code null}, a new one element array is returned
      *  whose component type is the same as the element, unless the element itself is null,
      *  in which case the return type is Object[]</p>
      *
      * <pre>
      * ArrayUtils.add(null, null)      = [null]
      * ArrayUtils.add(null, "a")       = ["a"]
      * ArrayUtils.add(["a"], null)     = ["a", null]
      * ArrayUtils.add(["a"], "b")      = ["a", "b"]
      * ArrayUtils.add(["a", "b"], "c") = ["a", "b", "c"]
      * </pre>
      *
      * @param <T> the component type of the array
      * @param array  the array to "add" the element to, may be {@code null}
      * @param element  the object to add, may be {@code null}
      * @return A new array containing the existing elements plus the new element
      * The returned array type will be that of the input array (unless null),
      * in which case it will have the same type as the element.
      * If both are null, an IllegalArgumentException is thrown
      * @since 2.1
      * @throws IllegalArgumentException if both arguments are null
      */
     public static <T> T[] add(final T[] array, final T element) {
         Class<?> type;
         if (array != null){
             type = array.getClass();
         } else if (element != null) {
             type = element.getClass();
         } else {
             throw new IllegalArgumentException("Arguments cannot both be null");
         }
         @SuppressWarnings("unchecked") // type must be T
         final
         T[] newArray = (T[]) copyArrayGrow1(array, type);
         newArray[newArray.length - 1] = element;
         return newArray;
     }
 
     /**
      * <p>Copies the given array and adds the given element at the end of the new array.</p>
      *
      * <p>The new array contains the same elements of the input
      * array plus the given element in the last position. The component type of
      * the new array is the same as that of the input array.</p>
      *
      * <p>If the input array is {@code null}, a new one element array is returned
      *  whose component type is the same as the element.</p>
      *
      * <pre>
      * ArrayUtils.add(null, true)          = [true]
      * ArrayUtils.add([true], false)       = [true, false]
      * ArrayUtils.add([true, false], true) = [true, false, true]
      * </pre>
      *
      * @param array  the array to copy and add the element to, may be {@code null}
      * @param element  the object to add at the last index of the new array
      * @return A new array containing the existing elements plus the new element
      * @since 2.1
      */
     public static boolean[] add(final boolean[] array, final boolean element) {
         final boolean[] newArray = (boolean[])copyArrayGrow1(array, Boolean.TYPE);
         newArray[newArray.length - 1] = element;
         return newArray;
     }
 
     /**
      * <p>Copies the given array and adds the given element at the end of the new array.</p>
      *
      * <p>The new array contains the same elements of the input
      * array plus the given element in the last position. The component type of
      * the new array is the same as that of the input array.</p>
      *
      * <p>If the input array is {@code null}, a new one element array is returned
      *  whose component type is the same as the element.</p>
      *
      * <pre>
      * ArrayUtils.add(null, 0)   = [0]
      * ArrayUtils.add([1], 0)    = [1, 0]
      * ArrayUtils.add([1, 0], 1) = [1, 0, 1]
      * </pre>
      *
      * @param array  the array to copy and add the element to, may be {@code null}
      * @param element  the object to add at the last index of the new array
      * @return A new array containing the existing elements plus the new element
      * @since 2.1
      */
     public static byte[] add(final byte[] array, final byte element) {
         final byte[] newArray = (byte[])copyArrayGrow1(array, Byte.TYPE);
         newArray[newArray.length - 1] = element;
         return newArray;
     }
 
     /**
      * <p>Copies the given array and adds the given element at the end of the new array.</p>
      *
      * <p>The new array contains the same elements of the input
      * array plus the given element in the last position. The component type of
      * the new array is the same as that of the input array.</p>
      *
      * <p>If the input array is {@code null}, a new one element array is returned
      *  whose component type is the same as the element.</p>
      *
      * <pre>
      * ArrayUtils.add(null, '0')       = ['0']
      * ArrayUtils.add(['1'], '0')      = ['1', '0']
      * ArrayUtils.add(['1', '0'], '1') = ['1', '0', '1']
      * </pre>
      *
      * @param array  the array to copy and add the element to, may be {@code null}
      * @param element  the object to add at the last index of the new array
      * @return A new array containing the existing elements plus the new element
      * @since 2.1
      */
     public static char[] add(final char[] array, final char element) {
         final char[] newArray = (char[])copyArrayGrow1(array, Character.TYPE);
         newArray[newArray.length - 1] = element;
         return newArray;
     }
 
     /**
      * <p>Copies the given array and adds the given element at the end of the new array.</p>
      *
      * <p>The new array contains the same elements of the input
      * array plus the given element in the last position. The component type of
      * the new array is the same as that of the input array.</p>
      *
      * <p>If the input array is {@code null}, a new one element array is returned
      *  whose component type is the same as the element.</p>
      *
      * <pre>
      * ArrayUtils.add(null, 0)   = [0]
      * ArrayUtils.add([1], 0)    = [1, 0]
      * ArrayUtils.add([1, 0], 1) = [1, 0, 1]
      * </pre>
      *
      * @param array  the array to copy and add the element to, may be {@code null}
      * @param element  the object to add at the last index of the new array
      * @return A new array containing the existing elements plus the new element
      * @since 2.1
      */
     public static double[] add(final double[] array, final double element) {
         final double[] newArray = (double[])copyArrayGrow1(array, Double.TYPE);
         newArray[newArray.length - 1] = element;
         return newArray;
     }
 
     /**
      * <p>Copies the given array and adds the given element at the end of the new array.</p>
      *
      * <p>The new array contains the same elements of the input
      * array plus the given element in the last position. The component type of
      * the new array is the same as that of the input array.</p>
      *
      * <p>If the input array is {@code null}, a new one element array is returned
      *  whose component type is the same as the element.</p>
      *
      * <pre>
      * ArrayUtils.add(null, 0)   = [0]
      * ArrayUtils.add([1], 0)    = [1, 0]
      * ArrayUtils.add([1, 0], 1) = [1, 0, 1]
      * </pre>
      *
      * @param array  the array to copy and add the element to, may be {@code null}
      * @param element  the object to add at the last index of the new array
      * @return A new array containing the existing elements plus the new element
      * @since 2.1
      */
     public static float[] add(final float[] array, final float element) {
         final float[] newArray = (float[])copyArrayGrow1(array, Float.TYPE);
         newArray[newArray.length - 1] = element;
         return newArray;
     }
 
     /**
      * <p>Copies the given array and adds the given element at the end of the new array.</p>
      *
      * <p>The new array contains the same elements of the input
      * array plus the given element in the last position. The component type of
      * the new array is the same as that of the input array.</p>
      *
      * <p>If the input array is {@code null}, a new one element array is returned
      *  whose component type is the same as the element.</p>
      *
      * <pre>
      * ArrayUtils.add(null, 0)   = [0]
      * ArrayUtils.add([1], 0)    = [1, 0]
      * ArrayUtils.add([1, 0], 1) = [1, 0, 1]
      * </pre>
      *
      * @param array  the array to copy and add the element to, may be {@code null}
      * @param element  the object to add at the last index of the new array
      * @return A new array containing the existing elements plus the new element
      * @since 2.1
      */
     public static int[] add(final int[] array, final int element) {
         final int[] newArray = (int[])copyArrayGrow1(array, Integer.TYPE);
         newArray[newArray.length - 1] = element;
         return newArray;
     }
 
     /**
      * <p>Copies the given array and adds the given element at the end of the new array.</p>
      *
      * <p>The new array contains the same elements of the input
      * array plus the given element in the last position. The component type of
      * the new array is the same as that of the input array.</p>
      *
      * <p>If the input array is {@code null}, a new one element array is returned
      *  whose component type is the same as the element.</p>
      *
      * <pre>
      * ArrayUtils.add(null, 0)   = [0]
      * ArrayUtils.add([1], 0)    = [1, 0]
      * ArrayUtils.add([1, 0], 1) = [1, 0, 1]
      * </pre>
      *
      * @param array  the array to copy and add the element to, may be {@code null}
      * @param element  the object to add at the last index of the new array
      * @return A new array containing the existing elements plus the new element
      * @since 2.1
      */
     public static long[] add(final long[] array, final long element) {
         final long[] newArray = (long[])copyArrayGrow1(array, Long.TYPE);
         newArray[newArray.length - 1] = element;
         return newArray;
     }
 
     /**
      * <p>Copies the given array and adds the given element at the end of the new array.</p>
      *
      * <p>The new array contains the same elements of the input
      * array plus the given element in the last position. The component type of
      * the new array is the same as that of the input array.</p>
      *
      * <p>If the input array is {@code null}, a new one element array is returned
      *  whose component type is the same as the element.</p>
      *
      * <pre>
      * ArrayUtils.add(null, 0)   = [0]
      * ArrayUtils.add([1], 0)    = [1, 0]
      * ArrayUtils.add([1, 0], 1) = [1, 0, 1]
      * </pre>
      *
      * @param array  the array to copy and add the element to, may be {@code null}
      * @param element  the object to add at the last index of the new array
      * @return A new array containing the existing elements plus the new element
      * @since 2.1
      */
     public static short[] add(final short[] array, final short element) {
         final short[] newArray = (short[])copyArrayGrow1(array, Short.TYPE);
         newArray[newArray.length - 1] = element;
         return newArray;
     }
 
     /**
      * Returns a copy of the given array of size 1 greater than the argument.
      * The last value of the array is left to the default value.
      *
      * @param array The array to copy, must not be {@code null}.
      * @param newArrayComponentType If {@code array} is {@code null}, create a
      * size 1 array of this type.
      * @return A new copy of the array of size 1 greater than the input.
      */
     private static Object copyArrayGrow1(final Object array, final Class<?> newArrayComponentType) {
         if (array != null) {
             final int arrayLength = Array.getLength(array);
             final Object newArray = Array.newInstance(array.getClass().getComponentType(), arrayLength + 1);
             System.arraycopy(array, 0, newArray, 0, arrayLength);
             return newArray;
         }
         return Array.newInstance(newArrayComponentType, 1);
     }
 
     /**
      * <p>Inserts the specified element at the specified position in the array.
      * Shifts the element currently at that position (if any) and any subsequent
      * elements to the right (adds one to their indices).</p>
      *
      * <p>This method returns a new array with the same elements of the input
      * array plus the given element on the specified position. The component
      * type of the returned array is always the same as that of the input
      * array.</p>
      *
      * <p>If the input array is {@code null}, a new one element array is returned
      *  whose component type is the same as the element.</p>
      *
      * <pre>
      * ArrayUtils.add(null, 0, null)      = [null]
      * ArrayUtils.add(null, 0, "a")       = ["a"]
      * ArrayUtils.add(["a"], 1, null)     = ["a", null]
      * ArrayUtils.add(["a"], 1, "b")      = ["a", "b"]
      * ArrayUtils.add(["a", "b"], 3, "c") = ["a", "b", "c"]
      * </pre>
      *
      * @param <T> the component type of the array
      * @param array  the array to add the element to, may be {@code null}
      * @param index  the position of the new object
      * @param element  the object to add
      * @return A new array containing the existing elements and the new element
      * @throws IndexOutOfBoundsException if the index is out of range
      * (index < 0 || index > array.length).
      * @throws IllegalArgumentException if both array and element are null
      */
     public static <T> T[] add(final T[] array, final int index, final T element) {
         Class<?> clss = null;
         if (array != null) {
             clss = array.getClass().getComponentType();
         } else if (element != null) {
             clss = element.getClass();
         } else {
             throw new IllegalArgumentException("Array and element cannot both be null");
         }
         @SuppressWarnings("unchecked") // the add method creates an array of type clss, which is type T
         final T[] newArray = (T[]) add(array, index, element, clss);
         return newArray;
     }
 
     /**
      * <p>Inserts the specified element at the specified position in the array.
      * Shifts the element currently at that position (if any) and any subsequent
      * elements to the right (adds one to their indices).</p>
      *
      * <p>This method returns a new array with the same elements of the input
      * array plus the given element on the specified position. The component
      * type of the returned array is always the same as that of the input
      * array.</p>
      *
      * <p>If the input array is {@code null}, a new one element array is returned
      *  whose component type is the same as the element.</p>
      *
      * <pre>
      * ArrayUtils.add(null, 0, true)          = [true]
      * ArrayUtils.add([true], 0, false)       = [false, true]
      * ArrayUtils.add([false], 1, true)       = [false, true]
      * ArrayUtils.add([true, false], 1, true) = [true, true, false]
      * </pre>
      *
      * @param array  the array to add the element to, may be {@code null}
      * @param index  the position of the new object
      * @param element  the object to add
      * @return A new array containing the existing elements and the new element
      * @throws IndexOutOfBoundsException if the index is out of range
      * (index < 0 || index > array.length).
      */
     public static boolean[] add(final boolean[] array, final int index, final boolean element) {
         return (boolean[]) add(array, index, Boolean.valueOf(element), Boolean.TYPE);
     }
 
     /**
      * <p>Inserts the specified element at the specified position in the array.
      * Shifts the element currently at that position (if any) and any subsequent
      * elements to the right (adds one to their indices).</p>
      *
      * <p>This method returns a new array with the same elements of the input
      * array plus the given element on the specified position. The component
      * type of the returned array is always the same as that of the input
      * array.</p>
      *
      * <p>If the input array is {@code null}, a new one element array is returned
      *  whose component type is the same as the element.</p>
      *
      * <pre>
      * ArrayUtils.add(null, 0, 'a')            = ['a']
      * ArrayUtils.add(['a'], 0, 'b')           = ['b', 'a']
      * ArrayUtils.add(['a', 'b'], 0, 'c')      = ['c', 'a', 'b']
      * ArrayUtils.add(['a', 'b'], 1, 'k')      = ['a', 'k', 'b']
      * ArrayUtils.add(['a', 'b', 'c'], 1, 't') = ['a', 't', 'b', 'c']
      * </pre>
      *
      * @param array  the array to add the element to, may be {@code null}
      * @param index  the position of the new object
      * @param element  the object to add
      * @return A new array containing the existing elements and the new element
      * @throws IndexOutOfBoundsException if the index is out of range
      * (index < 0 || index > array.length).
      */
     public static char[] add(final char[] array, final int index, final char element) {
         return (char[]) add(array, index, Character.valueOf(element), Character.TYPE);
     }
 
     /**
      * <p>Inserts the specified element at the specified position in the array.
      * Shifts the element currently at that position (if any) and any subsequent
      * elements to the right (adds one to their indices).</p>
      *
      * <p>This method returns a new array with the same elements of the input
      * array plus the given element on the specified position. The component
      * type of the returned array is always the same as that of the input
      * array.</p>
      *
      * <p>If the input array is {@code null}, a new one element array is returned
      *  whose component type is the same as the element.</p>
      *
      * <pre>
      * ArrayUtils.add([1], 0, 2)         = [2, 1]
      * ArrayUtils.add([2, 6], 2, 3)      = [2, 6, 3]
      * ArrayUtils.add([2, 6], 0, 1)      = [1, 2, 6]
      * ArrayUtils.add([2, 6, 3], 2, 1)   = [2, 6, 1, 3]
      * </pre>
      *
      * @param array  the array to add the element to, may be {@code null}
      * @param index  the position of the new object
      * @param element  the object to add
      * @return A new array containing the existing elements and the new element
      * @throws IndexOutOfBoundsException if the index is out of range
      * (index < 0 || index > array.length).
      */
     public static byte[] add(final byte[] array, final int index, final byte element) {
         return (byte[]) add(array, index, Byte.valueOf(element), Byte.TYPE);
     }
 
     /**
      * <p>Inserts the specified element at the specified position in the array.
      * Shifts the element currently at that position (if any) and any subsequent
      * elements to the right (adds one to their indices).</p>
      *
      * <p>This method returns a new array with the same elements of the input
      * array plus the given element on the specified position. The component
      * type of the returned array is always the same as that of the input
      * array.</p>
      *
      * <p>If the input array is {@code null}, a new one element array is returned
      *  whose component type is the same as the element.</p>
      *
      * <pre>
      * ArrayUtils.add([1], 0, 2)         = [2, 1]
      * ArrayUtils.add([2, 6], 2, 10)     = [2, 6, 10]
      * ArrayUtils.add([2, 6], 0, -4)     = [-4, 2, 6]
      * ArrayUtils.add([2, 6, 3], 2, 1)   = [2, 6, 1, 3]
      * </pre>
      *
      * @param array  the array to add the element to, may be {@code null}
      * @param index  the position of the new object
      * @param element  the object to add
      * @return A new array containing the existing elements and the new element
      * @throws IndexOutOfBoundsException if the index is out of range
      * (index < 0 || index > array.length).
      */
     public static short[] add(final short[] array, final int index, final short element) {
         return (short[]) add(array, index, Short.valueOf(element), Short.TYPE);
     }
 
     /**
      * <p>Inserts the specified element at the specified position in the array.
      * Shifts the element currently at that position (if any) and any subsequent
      * elements to the right (adds one to their indices).</p>
      *
      * <p>This method returns a new array with the same elements of the input
      * array plus the given element on the specified position. The component
      * type of the returned array is always the same as that of the input
      * array.</p>
      *
      * <p>If the input array is {@code null}, a new one element array is returned
      *  whose component type is the same as the element.</p>
      *
      * <pre>
      * ArrayUtils.add([1], 0, 2)         = [2, 1]
      * ArrayUtils.add([2, 6], 2, 10)     = [2, 6, 10]
      * ArrayUtils.add([2, 6], 0, -4)     = [-4, 2, 6]
      * ArrayUtils.add([2, 6, 3], 2, 1)   = [2, 6, 1, 3]
      * </pre>
      *
      * @param array  the array to add the element to, may be {@code null}
      * @param index  the position of the new object
      * @param element  the object to add
      * @return A new array containing the existing elements and the new element
      * @throws IndexOutOfBoundsException if the index is out of range
      * (index < 0 || index > array.length).
      */
     public static int[] add(final int[] array, final int index, final int element) {
         return (int[]) add(array, index, Integer.valueOf(element), Integer.TYPE);
     }
 
     /**
      * <p>Inserts the specified element at the specified position in the array.
      * Shifts the element currently at that position (if any) and any subsequent
      * elements to the right (adds one to their indices).</p>
      *
      * <p>This method returns a new array with the same elements of the input
      * array plus the given element on the specified position. The component
      * type of the returned array is always the same as that of the input
      * array.</p>
      *
      * <p>If the input array is {@code null}, a new one element array is returned
      *  whose component type is the same as the element.</p>
      *
      * <pre>
      * ArrayUtils.add([1L], 0, 2L)           = [2L, 1L]
      * ArrayUtils.add([2L, 6L], 2, 10L)      = [2L, 6L, 10L]
      * ArrayUtils.add([2L, 6L], 0, -4L)      = [-4L, 2L, 6L]
      * ArrayUtils.add([2L, 6L, 3L], 2, 1L)   = [2L, 6L, 1L, 3L]
      * </pre>
      *
      * @param array  the array to add the element to, may be {@code null}
      * @param index  the position of the new object
      * @param element  the object to add
      * @return A new array containing the existing elements and the new element
      * @throws IndexOutOfBoundsException if the index is out of range
      * (index < 0 || index > array.length).
      */
     public static long[] add(final long[] array, final int index, final long element) {
         return (long[]) add(array, index, Long.valueOf(element), Long.TYPE);
     }
 
     /**
      * <p>Inserts the specified element at the specified position in the array.
      * Shifts the element currently at that position (if any) and any subsequent
      * elements to the right (adds one to their indices).</p>
      *
      * <p>This method returns a new array with the same elements of the input
      * array plus the given element on the specified position. The component
      * type of the returned array is always the same as that of the input
      * array.</p>
      *
      * <p>If the input array is {@code null}, a new one element array is returned
      *  whose component type is the same as the element.</p>
      *
      * <pre>
      * ArrayUtils.add([1.1f], 0, 2.2f)               = [2.2f, 1.1f]
      * ArrayUtils.add([2.3f, 6.4f], 2, 10.5f)        = [2.3f, 6.4f, 10.5f]
      * ArrayUtils.add([2.6f, 6.7f], 0, -4.8f)        = [-4.8f, 2.6f, 6.7f]
      * ArrayUtils.add([2.9f, 6.0f, 0.3f], 2, 1.0f)   = [2.9f, 6.0f, 1.0f, 0.3f]
      * </pre>
      *
      * @param array  the array to add the element to, may be {@code null}
      * @param index  the position of the new object
      * @param element  the object to add
      * @return A new array containing the existing elements and the new element
      * @throws IndexOutOfBoundsException if the index is out of range
      * (index < 0 || index > array.length).
      */
     public static float[] add(final float[] array, final int index, final float element) {
         return (float[]) add(array, index, Float.valueOf(element), Float.TYPE);
     }
 
     /**
      * <p>Inserts the specified element at the specified position in the array.
      * Shifts the element currently at that position (if any) and any subsequent
      * elements to the right (adds one to their indices).</p>
      *
      * <p>This method returns a new array with the same elements of the input
      * array plus the given element on the specified position. The component
      * type of the returned array is always the same as that of the input
      * array.</p>
      *
      * <p>If the input array is {@code null}, a new one element array is returned
      *  whose component type is the same as the element.</p>
      *
      * <pre>
      * ArrayUtils.add([1.1], 0, 2.2)              = [2.2, 1.1]
      * ArrayUtils.add([2.3, 6.4], 2, 10.5)        = [2.3, 6.4, 10.5]
      * ArrayUtils.add([2.6, 6.7], 0, -4.8)        = [-4.8, 2.6, 6.7]
      * ArrayUtils.add([2.9, 6.0, 0.3], 2, 1.0)    = [2.9, 6.0, 1.0, 0.3]
      * </pre>
      *
      * @param array  the array to add the element to, may be {@code null}
      * @param index  the position of the new object
      * @param element  the object to add
      * @return A new array containing the existing elements and the new element
      * @throws IndexOutOfBoundsException if the index is out of range
      * (index < 0 || index > array.length).
      */
     public static double[] add(final double[] array, final int index, final double element) {
         return (double[]) add(array, index, Double.valueOf(element), Double.TYPE);
     }
 
     /**
      * Underlying implementation of add(array, index, element) methods.
      * The last parameter is the class, which may not equal element.getClass
      * for primitives.
      *
      * @param array  the array to add the element to, may be {@code null}
      * @param index  the position of the new object
      * @param element  the object to add
      * @param clss the type of the element being added
      * @return A new array containing the existing elements and the new element
      */
     private static Object add(final Object array, final int index, final Object element, final Class<?> clss) {
         if (array == null) {
             if (index != 0) {
                 throw new IndexOutOfBoundsException("Index: " + index + ", Length: 0");
             }
             final Object joinedArray = Array.newInstance(clss, 1);
             Array.set(joinedArray, 0, element);
             return joinedArray;
         }
         final int length = Array.getLength(array);
         if (index > length || index < 0) {
             throw new IndexOutOfBoundsException("Index: " + index + ", Length: " + length);
         }
         final Object result = Array.newInstance(clss, length + 1);
         System.arraycopy(array, 0, result, 0, index);
         Array.set(result, index, element);
         if (index < length) {
             System.arraycopy(array, index, result, index + 1, length - index);
         }
         return result;
     }
 
     /**
      * <p>Removes the element at the specified position from the specified array.
      * All subsequent elements are shifted to the left (subtracts one from
      * their indices).</p>
      *
      * <p>This method returns a new array with the same elements of the input
      * array except the element on the specified position. The component
      * type of the returned array is always the same as that of the input
      * array.</p>
      *
      * <p>If the input array is {@code null}, an IndexOutOfBoundsException
      * will be thrown, because in that case no valid index can be specified.</p>
      *
      * <pre>
      * ArrayUtils.remove(["a"], 0)           = []
      * ArrayUtils.remove(["a", "b"], 0)      = ["b"]
      * ArrayUtils.remove(["a", "b"], 1)      = ["a"]
      * ArrayUtils.remove(["a", "b", "c"], 1) = ["a", "c"]
      * </pre>
      *
      * @param <T> the component type of the array
      * @param array  the array to remove the element from, may not be {@code null}
      * @param index  the position of the element to be removed
      * @return A new array containing the existing elements except the element
      *         at the specified position.
      * @throws IndexOutOfBoundsException if the index is out of range
      * (index < 0 || index >= array.length), or if the array is {@code null}.
      * @since 2.1
      */
     @SuppressWarnings("unchecked") // remove() always creates an array of the same type as its input
     public static <T> T[] remove(final T[] array, final int index) {
         return (T[]) remove((Object) array, index);
     }
 
     /**
      * <p>Removes the first occurrence of the specified element from the
      * specified array. All subsequent elements are shifted to the left
      * (subtracts one from their indices). If the array doesn't contains
      * such an element, no elements are removed from the array.</p>
      *
      * <p>This method returns a new array with the same elements of the input
      * array except the first occurrence of the specified element. The component
      * type of the returned array is always the same as that of the input
      * array.</p>
      *
      * <pre>
      * ArrayUtils.removeElement(null, "a")            = null
      * ArrayUtils.removeElement([], "a")              = []
      * ArrayUtils.removeElement(["a"], "b")           = ["a"]
      * ArrayUtils.removeElement(["a", "b"], "a")      = ["b"]
      * ArrayUtils.removeElement(["a", "b", "a"], "a") = ["b", "a"]
      * </pre>
      *
      * @param <T> the component type of the array
      * @param array  the array to remove the element from, may be {@code null}
      * @param element  the element to be removed
      * @return A new array containing the existing elements except the first
      *         occurrence of the specified element.
      * @since 2.1
      */
     public static <T> T[] removeElement(final T[] array, final Object element) {
         final int index = indexOf(array, element);
         if (index == INDEX_NOT_FOUND) {
             return clone(array);
         }
         return remove(array, index);
     }
 
     /**
      * <p>Removes the element at the specified position from the specified array.
      * All subsequent elements are shifted to the left (subtracts one from
      * their indices).</p>
      *
      * <p>This method returns a new array with the same elements of the input
      * array except the element on the specified position. The component
      * type of the returned array is always the same as that of the input
      * array.</p>
      *
      * <p>If the input array is {@code null}, an IndexOutOfBoundsException
      * will be thrown, because in that case no valid index can be specified.</p>
      *
      * <pre>
      * ArrayUtils.remove([true], 0)              = []
      * ArrayUtils.remove([true, false], 0)       = [false]
      * ArrayUtils.remove([true, false], 1)       = [true]
      * ArrayUtils.remove([true, true, false], 1) = [true, false]
      * </pre>
      *
      * @param array  the array to remove the element from, may not be {@code null}
      * @param index  the position of the element to be removed
      * @return A new array containing the existing elements except the element
      *         at the specified position.
      * @throws IndexOutOfBoundsException if the index is out of range
      * (index < 0 || index >= array.length), or if the array is {@code null}.
      * @since 2.1
      */
     public static boolean[] remove(final boolean[] array, final int index) {
         return (boolean[]) remove((Object) array, index);
     }
 
     /**
      * <p>Removes the first occurrence of the specified element from the
      * specified array. All subsequent elements are shifted to the left
      * (subtracts one from their indices). If the array doesn't contains
      * such an element, no elements are removed from the array.</p>
      *
      * <p>This method returns a new array with the same elements of the input
      * array except the first occurrence of the specified element. The component
      * type of the returned array is always the same as that of the input
      * array.</p>
      *
      * <pre>
      * ArrayUtils.removeElement(null, true)                = null
      * ArrayUtils.removeElement([], true)                  = []
      * ArrayUtils.removeElement([true], false)             = [true]
      * ArrayUtils.removeElement([true, false], false)      = [true]
      * ArrayUtils.removeElement([true, false, true], true) = [false, true]
      * </pre>
      *
      * @param array  the array to remove the element from, may be {@code null}
      * @param element  the element to be removed
      * @return A new array containing the existing elements except the first
      *         occurrence of the specified element.
      * @since 2.1
      */
     public static boolean[] removeElement(final boolean[] array, final boolean element) {
         final int index = indexOf(array, element);
         if (index == INDEX_NOT_FOUND) {
             return clone(array);
         }
         return remove(array, index);
     }
 
     /**
      * <p>Removes the element at the specified position from the specified array.
      * All subsequent elements are shifted to the left (subtracts one from
      * their indices).</p>
      *
      * <p>This method returns a new array with the same elements of the input
      * array except the element on the specified position. The component
      * type of the returned array is always the same as that of the input
      * array.</p>
      *
      * <p>If the input array is {@code null}, an IndexOutOfBoundsException
      * will be thrown, because in that case no valid index can be specified.</p>
      *
      * <pre>
      * ArrayUtils.remove([1], 0)          = []
      * ArrayUtils.remove([1, 0], 0)       = [0]
      * ArrayUtils.remove([1, 0], 1)       = [1]
      * ArrayUtils.remove([1, 0, 1], 1)    = [1, 1]
      * </pre>
      *
      * @param array  the array to remove the element from, may not be {@code null}
      * @param index  the position of the element to be removed
      * @return A new array containing the existing elements except the element
      *         at the specified position.
      * @throws IndexOutOfBoundsException if the index is out of range
      * (index < 0 || index >= array.length), or if the array is {@code null}.
      * @since 2.1
      */
     public static byte[] remove(final byte[] array, final int index) {
         return (byte[]) remove((Object) array, index);
     }
 
     /**
      * <p>Removes the first occurrence of the specified element from the
      * specified array. All subsequent elements are shifted to the left
      * (subtracts one from their indices). If the array doesn't contains
      * such an element, no elements are removed from the array.</p>
      *
      * <p>This method returns a new array with the same elements of the input
      * array except the first occurrence of the specified element. The component
      * type of the returned array is always the same as that of the input
      * array.</p>
      *
      * <pre>
      * ArrayUtils.removeElement(null, 1)        = null
      * ArrayUtils.removeElement([], 1)          = []
      * ArrayUtils.removeElement([1], 0)         = [1]
      * ArrayUtils.removeElement([1, 0], 0)      = [1]
      * ArrayUtils.removeElement([1, 0, 1], 1)   = [0, 1]
      * </pre>
      *
      * @param array  the array to remove the element from, may be {@code null}
      * @param element  the element to be removed
      * @return A new array containing the existing elements except the first
      *         occurrence of the specified element.
      * @since 2.1
      */
     public static byte[] removeElement(final byte[] array, final byte element) {
         final int index = indexOf(array, element);
         if (index == INDEX_NOT_FOUND) {
             return clone(array);
         }
         return remove(array, index);
     }
 
     /**
      * <p>Removes the element at the specified position from the specified array.
      * All subsequent elements are shifted to the left (subtracts one from
      * their indices).</p>
      *
      * <p>This method returns a new array with the same elements of the input
      * array except the element on the specified position. The component
      * type of the returned array is always the same as that of the input
      * array.</p>
      *
      * <p>If the input array is {@code null}, an IndexOutOfBoundsException
      * will be thrown, because in that case no valid index can be specified.</p>
      *
      * <pre>
      * ArrayUtils.remove(['a'], 0)           = []
      * ArrayUtils.remove(['a', 'b'], 0)      = ['b']
      * ArrayUtils.remove(['a', 'b'], 1)      = ['a']
      * ArrayUtils.remove(['a', 'b', 'c'], 1) = ['a', 'c']
      * </pre>
      *
      * @param array  the array to remove the element from, may not be {@code null}
      * @param index  the position of the element to be removed
      * @return A new array containing the existing elements except the element
      *         at the specified position.
      * @throws IndexOutOfBoundsException if the index is out of range
      * (index < 0 || index >= array.length), or if the array is {@code null}.
      * @since 2.1
      */
     public static char[] remove(final char[] array, final int index) {
         return (char[]) remove((Object) array, index);
     }
 
     /**
      * <p>Removes the first occurrence of the specified element from the
      * specified array. All subsequent elements are shifted to the left
      * (subtracts one from their indices). If the array doesn't contains
      * such an element, no elements are removed from the array.</p>
      *
      * <p>This method returns a new array with the same elements of the input
      * array except the first occurrence of the specified element. The component
      * type of the returned array is always the same as that of the input
      * array.</p>
      *
      * <pre>
      * ArrayUtils.removeElement(null, 'a')            = null
      * ArrayUtils.removeElement([], 'a')              = []
      * ArrayUtils.removeElement(['a'], 'b')           = ['a']
      * ArrayUtils.removeElement(['a', 'b'], 'a')      = ['b']
      * ArrayUtils.removeElement(['a', 'b', 'a'], 'a') = ['b', 'a']
      * </pre>
      *
      * @param array  the array to remove the element from, may be {@code null}
      * @param element  the element to be removed
      * @return A new array containing the existing elements except the first
      *         occurrence of the specified element.
      * @since 2.1
      */
     public static char[] removeElement(final char[] array, final char element) {
         final int index = indexOf(array, element);
         if (index == INDEX_NOT_FOUND) {
             return clone(array);
         }
         return remove(array, index);
     }
 
     /**
      * <p>Removes the element at the specified position from the specified array.
      * All subsequent elements are shifted to the left (subtracts one from
      * their indices).</p>
      *
      * <p>This method returns a new array with the same elements of the input
      * array except the element on the specified position. The component
      * type of the returned array is always the same as that of the input
      * array.</p>
      *
      * <p>If the input array is {@code null}, an IndexOutOfBoundsException
      * will be thrown, because in that case no valid index can be specified.</p>
      *
      * <pre>
      * ArrayUtils.remove([1.1], 0)           = []
      * ArrayUtils.remove([2.5, 6.0], 0)      = [6.0]
      * ArrayUtils.remove([2.5, 6.0], 1)      = [2.5]
      * ArrayUtils.remove([2.5, 6.0, 3.8], 1) = [2.5, 3.8]
      * </pre>
      *
      * @param array  the array to remove the element from, may not be {@code null}
      * @param index  the position of the element to be removed
      * @return A new array containing the existing elements except the element
      *         at the specified position.
      * @throws IndexOutOfBoundsException if the index is out of range
      * (index < 0 || index >= array.length), or if the array is {@code null}.
      * @since 2.1
      */
     public static double[] remove(final double[] array, final int index) {
         return (double[]) remove((Object) array, index);
     }
 
     /**
      * <p>Removes the first occurrence of the specified element from the
      * specified array. All subsequent elements are shifted to the left
      * (subtracts one from their indices). If the array doesn't contains
      * such an element, no elements are removed from the array.</p>
      *
      * <p>This method returns a new array with the same elements of the input
      * array except the first occurrence of the specified element. The component
      * type of the returned array is always the same as that of the input
      * array.</p>
      *
      * <pre>
      * ArrayUtils.removeElement(null, 1.1)            = null
      * ArrayUtils.removeElement([], 1.1)              = []
      * ArrayUtils.removeElement([1.1], 1.2)           = [1.1]
      * ArrayUtils.removeElement([1.1, 2.3], 1.1)      = [2.3]
      * ArrayUtils.removeElement([1.1, 2.3, 1.1], 1.1) = [2.3, 1.1]
      * </pre>
      *
      * @param array  the array to remove the element from, may be {@code null}
      * @param element  the element to be removed
      * @return A new array containing the existing elements except the first
      *         occurrence of the specified element.
      * @since 2.1
      */
     public static double[] removeElement(final double[] array, final double element) {
         final int index = indexOf(array, element);
         if (index == INDEX_NOT_FOUND) {
             return clone(array);
         }
         return remove(array, index);
     }
 
     /**
      * <p>Removes the element at the specified position from the specified array.
      * All subsequent elements are shifted to the left (subtracts one from
      * their indices).</p>
      *
      * <p>This method returns a new array with the same elements of the input
      * array except the element on the specified position. The component
      * type of the returned array is always the same as that of the input
      * array.</p>
      *
      * <p>If the input array is {@code null}, an IndexOutOfBoundsException
      * will be thrown, because in that case no valid index can be specified.</p>
      *
      * <pre>
      * ArrayUtils.remove([1.1], 0)           = []
      * ArrayUtils.remove([2.5, 6.0], 0)      = [6.0]
      * ArrayUtils.remove([2.5, 6.0], 1)      = [2.5]
      * ArrayUtils.remove([2.5, 6.0, 3.8], 1) = [2.5, 3.8]
      * </pre>
      *
      * @param array  the array to remove the element from, may not be {@code null}
      * @param index  the position of the element to be removed
      * @return A new array containing the existing elements except the element
      *         at the specified position.
      * @throws IndexOutOfBoundsException if the index is out of range
      * (index < 0 || index >= array.length), or if the array is {@code null}.
      * @since 2.1
      */
     public static float[] remove(final float[] array, final int index) {
         return (float[]) remove((Object) array, index);
     }
 
     /**
      * <p>Removes the first occurrence of the specified element from the
      * specified array. All subsequent elements are shifted to the left
      * (subtracts one from their indices). If the array doesn't contains
      * such an element, no elements are removed from the array.</p>
      *
      * <p>This method returns a new array with the same elements of the input
      * array except the first occurrence of the specified element. The component
      * type of the returned array is always the same as that of the input
      * array.</p>
      *
      * <pre>
      * ArrayUtils.removeElement(null, 1.1)            = null
      * ArrayUtils.removeElement([], 1.1)              = []
      * ArrayUtils.removeElement([1.1], 1.2)           = [1.1]
      * ArrayUtils.removeElement([1.1, 2.3], 1.1)      = [2.3]
      * ArrayUtils.removeElement([1.1, 2.3, 1.1], 1.1) = [2.3, 1.1]
      * </pre>
      *
      * @param array  the array to remove the element from, may be {@code null}
      * @param element  the element to be removed
      * @return A new array containing the existing elements except the first
      *         occurrence of the specified element.
      * @since 2.1
      */
     public static float[] removeElement(final float[] array, final float element) {
         final int index = indexOf(array, element);
         if (index == INDEX_NOT_FOUND) {
             return clone(array);
         }
         return remove(array, index);
     }
 
     /**
      * <p>Removes the element at the specified position from the specified array.
      * All subsequent elements are shifted to the left (subtracts one from
      * their indices).</p>
      *
      * <p>This method returns a new array with the same elements of the input
      * array except the element on the specified position. The component
      * type of the returned array is always the same as that of the input
      * array.</p>
      *
      * <p>If the input array is {@code null}, an IndexOutOfBoundsException
      * will be thrown, because in that case no valid index can be specified.</p>
      *
      * <pre>
      * ArrayUtils.remove([1], 0)         = []
      * ArrayUtils.remove([2, 6], 0)      = [6]
      * ArrayUtils.remove([2, 6], 1)      = [2]
      * ArrayUtils.remove([2, 6, 3], 1)   = [2, 3]
      * </pre>
      *
      * @param array  the array to remove the element from, may not be {@code null}
      * @param index  the position of the element to be removed
      * @return A new array containing the existing elements except the element
      *         at the specified position.
      * @throws IndexOutOfBoundsException if the index is out of range
      * (index < 0 || index >= array.length), or if the array is {@code null}.
      * @since 2.1
      */
     public static int[] remove(final int[] array, final int index) {
         return (int[]) remove((Object) array, index);
     }
 
     /**
      * <p>Removes the first occurrence of the specified element from the
      * specified array. All subsequent elements are shifted to the left
      * (subtracts one from their indices). If the array doesn't contains
      * such an element, no elements are removed from the array.</p>
      *
      * <p>This method returns a new array with the same elements of the input
      * array except the first occurrence of the specified element. The component
      * type of the returned array is always the same as that of the input
      * array.</p>
      *
      * <pre>
      * ArrayUtils.removeElement(null, 1)      = null
      * ArrayUtils.removeElement([], 1)        = []
      * ArrayUtils.removeElement([1], 2)       = [1]
      * ArrayUtils.removeElement([1, 3], 1)    = [3]
      * ArrayUtils.removeElement([1, 3, 1], 1) = [3, 1]
      * </pre>
      *
      * @param array  the array to remove the element from, may be {@code null}
      * @param element  the element to be removed
      * @return A new array containing the existing elements except the first
      *         occurrence of the specified element.
      * @since 2.1
      */
     public static int[] removeElement(final int[] array, final int element) {
         final int index = indexOf(array, element);
         if (index == INDEX_NOT_FOUND) {
             return clone(array);
         }
         return remove(array, index);
     }
 
     /**
      * <p>Removes the element at the specified position from the specified array.
      * All subsequent elements are shifted to the left (subtracts one from
      * their indices).</p>
      *
      * <p>This method returns a new array with the same elements of the input
      * array except the element on the specified position. The component
      * type of the returned array is always the same as that of the input
      * array.</p>
      *
      * <p>If the input array is {@code null}, an IndexOutOfBoundsException
      * will be thrown, because in that case no valid index can be specified.</p>
      *
      * <pre>
      * ArrayUtils.remove([1], 0)         = []
      * ArrayUtils.remove([2, 6], 0)      = [6]
      * ArrayUtils.remove([2, 6], 1)      = [2]
      * ArrayUtils.remove([2, 6, 3], 1)   = [2, 3]
      * </pre>
      *
      * @param array  the array to remove the element from, may not be {@code null}
      * @param index  the position of the element to be removed
      * @return A new array containing the existing elements except the element
      *         at the specified position.
      * @throws IndexOutOfBoundsException if the index is out of range
      * (index < 0 || index >= array.length), or if the array is {@code null}.
      * @since 2.1
      */
     public static long[] remove(final long[] array, final int index) {
         return (long[]) remove((Object) array, index);
     }
 
     /**
      * <p>Removes the first occurrence of the specified element from the
      * specified array. All subsequent elements are shifted to the left
      * (subtracts one from their indices). If the array doesn't contains
      * such an element, no elements are removed from the array.</p>
      *
      * <p>This method returns a new array with the same elements of the input
      * array except the first occurrence of the specified element. The component
      * type of the returned array is always the same as that of the input
      * array.</p>
      *
      * <pre>
      * ArrayUtils.removeElement(null, 1)      = null
      * ArrayUtils.removeElement([], 1)        = []
      * ArrayUtils.removeElement([1], 2)       = [1]
      * ArrayUtils.removeElement([1, 3], 1)    = [3]
      * ArrayUtils.removeElement([1, 3, 1], 1) = [3, 1]
      * </pre>
      *
      * @param array  the array to remove the element from, may be {@code null}
      * @param element  the element to be removed
      * @return A new array containing the existing elements except the first
      *         occurrence of the specified element.
      * @since 2.1
      */
     public static long[] removeElement(final long[] array, final long element) {
         final int index = indexOf(array, element);
         if (index == INDEX_NOT_FOUND) {
             return clone(array);
         }
         return remove(array, index);
     }
 
     /**
      * <p>Removes the element at the specified position from the specified array.
      * All subsequent elements are shifted to the left (subtracts one from
      * their indices).</p>
      *
      * <p>This method returns a new array with the same elements of the input
      * array except the element on the specified position. The component
      * type of the returned array is always the same as that of the input
      * array.</p>
      *
      * <p>If the input array is {@code null}, an IndexOutOfBoundsException
      * will be thrown, because in that case no valid index can be specified.</p>
      *
      * <pre>
      * ArrayUtils.remove([1], 0)         = []
      * ArrayUtils.remove([2, 6], 0)      = [6]
      * ArrayUtils.remove([2, 6], 1)      = [2]
      * ArrayUtils.remove([2, 6, 3], 1)   = [2, 3]
      * </pre>
      *
      * @param array  the array to remove the element from, may not be {@code null}
      * @param index  the position of the element to be removed
      * @return A new array containing the existing elements except the element
      *         at the specified position.
      * @throws IndexOutOfBoundsException if the index is out of range
      * (index < 0 || index >= array.length), or if the array is {@code null}.
      * @since 2.1
      */
     public static short[] remove(final short[] array, final int index) {
         return (short[]) remove((Object) array, index);
     }
 
     /**
      * <p>Removes the first occurrence of the specified element from the
      * specified array. All subsequent elements are shifted to the left
      * (subtracts one from their indices). If the array doesn't contains
      * such an element, no elements are removed from the array.</p>
      *
      * <p>This method returns a new array with the same elements of the input
      * array except the first occurrence of the specified element. The component
      * type of the returned array is always the same as that of the input
      * array.</p>
      *
      * <pre>
      * ArrayUtils.removeElement(null, 1)      = null
      * ArrayUtils.removeElement([], 1)        = []
      * ArrayUtils.removeElement([1], 2)       = [1]
      * ArrayUtils.removeElement([1, 3], 1)    = [3]
      * ArrayUtils.removeElement([1, 3, 1], 1) = [3, 1]
      * </pre>
      *
      * @param array  the array to remove the element from, may be {@code null}
      * @param element  the element to be removed
      * @return A new array containing the existing elements except the first
      *         occurrence of the specified element.
      * @since 2.1
      */
     public static short[] removeElement(final short[] array, final short element) {
         final int index = indexOf(array, element);
         if (index == INDEX_NOT_FOUND) {
             return clone(array);
         }
         return remove(array, index);
     }
 
     /**
      * <p>Removes the element at the specified position from the specified array.
      * All subsequent elements are shifted to the left (subtracts one from
      * their indices).</p>
      *
      * <p>This method returns a new array with the same elements of the input
      * array except the element on the specified position. The component
      * type of the returned array is always the same as that of the input
      * array.</p>
      *
      * <p>If the input array is {@code null}, an IndexOutOfBoundsException
      * will be thrown, because in that case no valid index can be specified.</p>
      *
      * @param array  the array to remove the element from, may not be {@code null}
      * @param index  the position of the element to be removed
      * @return A new array containing the existing elements except the element
      *         at the specified position.
      * @throws IndexOutOfBoundsException if the index is out of range
      * (index < 0 || index >= array.length), or if the array is {@code null}.
      * @since 2.1
      */
     private static Object remove(final Object array, final int index) {
         final int length = getLength(array);
         if (index < 0 || index >= length) {
             throw new IndexOutOfBoundsException("Index: " + index + ", Length: " + length);
         }
 
         final Object result = Array.newInstance(array.getClass().getComponentType(), length - 1);
         System.arraycopy(array, 0, result, 0, index);
         if (index < length - 1) {
             System.arraycopy(array, index + 1, result, index, length - index - 1);
         }
 
         return result;
     }
 
     /**
      * <p>Removes the elements at the specified positions from the specified array.
      * All remaining elements are shifted to the left.</p>
      *
      * <p>This method returns a new array with the same elements of the input
      * array except those at the specified positions. The component
      * type of the returned array is always the same as that of the input
      * array.</p>
      *
      * <p>If the input array is {@code null}, an IndexOutOfBoundsException
      * will be thrown, because in that case no valid index can be specified.</p>
      *
      * <pre>
      * ArrayUtils.removeAll(["a", "b", "c"], 0, 2) = ["b"]
      * ArrayUtils.removeAll(["a", "b", "c"], 1, 2) = ["a"]
      * </pre>
      *
      * @param <T> the component type of the array
      * @param array   the array to remove the element from, may not be {@code null}
      * @param indices the positions of the elements to be removed
      * @return A new array containing the existing elements except those
      *         at the specified positions.
      * @throws IndexOutOfBoundsException if any index is out of range
      * (index < 0 || index >= array.length), or if the array is {@code null}.
      * @since 3.0.1
      */
     @SuppressWarnings("unchecked") // removeAll() always creates an array of the same type as its input
     public static <T> T[] removeAll(final T[] array, final int... indices) {
         return (T[]) removeAll((Object) array, clone(indices));
     }
 
     /**
      * <p>Removes occurrences of specified elements, in specified quantities,
      * from the specified array. All subsequent elements are shifted left.
      * For any element-to-be-removed specified in greater quantities than
      * contained in the original array, no change occurs beyond the
      * removal of the existing matching items.</p>
      *
      * <p>This method returns a new array with the same elements of the input
      * array except for the earliest-encountered occurrences of the specified
      * elements. The component type of the returned array is always the same
      * as that of the input array.</p>
      *
      * <pre>
      * ArrayUtils.removeElements(null, "a", "b")            = null
      * ArrayUtils.removeElements([], "a", "b")              = []
      * ArrayUtils.removeElements(["a"], "b", "c")           = ["a"]
      * ArrayUtils.removeElements(["a", "b"], "a", "c")      = ["b"]
      * ArrayUtils.removeElements(["a", "b", "a"], "a")      = ["b", "a"]
      * ArrayUtils.removeElements(["a", "b", "a"], "a", "a") = ["b"]
      * </pre>
      *
      * @param <T> the component type of the array
      * @param array  the array to remove the element from, may be {@code null}
      * @param values the elements to be removed
      * @return A new array containing the existing elements except the
      *         earliest-encountered occurrences of the specified elements.
      * @since 3.0.1
      */
     public static <T> T[] removeElements(final T[] array, final T... values) {
         if (isEmpty(array) || isEmpty(values)) {
             return clone(array);
         }
         final HashMap<T, MutableInt> occurrences = new HashMap<T, MutableInt>(values.length);
         for (final T v : values) {
             final MutableInt count = occurrences.get(v);
             if (count == null) {
                 occurrences.put(v, new MutableInt(1));
             } else {
                 count.increment();
             }
         }
         final BitSet toRemove = new BitSet();
         for (final Map.Entry<T, MutableInt> e : occurrences.entrySet()) {
             final T v = e.getKey();
             int found = 0;
             for (int i = 0, ct = e.getValue().intValue(); i < ct; i++) {
                 found = indexOf(array, v, found);
                 if (found < 0) {
                     break;
                 }
                 toRemove.set(found++);
             }
         }
         @SuppressWarnings("unchecked") // removeAll() always creates an array of the same type as its input
         final
         T[] result = (T[]) removeAll(array, toRemove);
         return result;
     }
 
     /**
      * <p>Removes the elements at the specified positions from the specified array.
      * All remaining elements are shifted to the left.</p>
      *
      * <p>This method returns a new array with the same elements of the input
      * array except those at the specified positions. The component
      * type of the returned array is always the same as that of the input
      * array.</p>
      *
      * <p>If the input array is {@code null}, an IndexOutOfBoundsException
      * will be thrown, because in that case no valid index can be specified.</p>
      *
      * <pre>
      * ArrayUtils.removeAll([1], 0)             = []
      * ArrayUtils.removeAll([2, 6], 0)          = [6]
      * ArrayUtils.removeAll([2, 6], 0, 1)       = []
      * ArrayUtils.removeAll([2, 6, 3], 1, 2)    = [2]
      * ArrayUtils.removeAll([2, 6, 3], 0, 2)    = [6]
      * ArrayUtils.removeAll([2, 6, 3], 0, 1, 2) = []
      * </pre>
      *
      * @param array   the array to remove the element from, may not be {@code null}
      * @param indices the positions of the elements to be removed
      * @return A new array containing the existing elements except those
      *         at the specified positions.
      * @throws IndexOutOfBoundsException if any index is out of range
      * (index < 0 || index >= array.length), or if the array is {@code null}.
      * @since 3.0.1
      */
     public static byte[] removeAll(final byte[] array, final int... indices) {
         return (byte[]) removeAll((Object) array, clone(indices));
     }
 
     /**
      * <p>Removes occurrences of specified elements, in specified quantities,
      * from the specified array. All subsequent elements are shifted left.
      * For any element-to-be-removed specified in greater quantities than
      * contained in the original array, no change occurs beyond the
      * removal of the existing matching items.</p>
      *
      * <p>This method returns a new array with the same elements of the input
      * array except for the earliest-encountered occurrences of the specified
      * elements. The component type of the returned array is always the same
      * as that of the input array.</p>
      *
      * <pre>
      * ArrayUtils.removeElements(null, 1, 2)      = null
      * ArrayUtils.removeElements([], 1, 2)        = []
      * ArrayUtils.removeElements([1], 2, 3)       = [1]
      * ArrayUtils.removeElements([1, 3], 1, 2)    = [3]
      * ArrayUtils.removeElements([1, 3, 1], 1)    = [3, 1]
      * ArrayUtils.removeElements([1, 3, 1], 1, 1) = [3]
      * </pre>
      *
      * @param array  the array to remove the element from, may be {@code null}
      * @param values the elements to be removed
      * @return A new array containing the existing elements except the
      *         earliest-encountered occurrences of the specified elements.
      * @since 3.0.1
      */
     public static byte[] removeElements(final byte[] array, final byte... values) {
         if (isEmpty(array) || isEmpty(values)) {
             return clone(array);
         }
         final HashMap<Byte, MutableInt> occurrences = new HashMap<Byte, MutableInt>(values.length);
         for (final byte v : values) {
             final Byte boxed = Byte.valueOf(v);
             final MutableInt count = occurrences.get(boxed);
             if (count == null) {
                 occurrences.put(boxed, new MutableInt(1));
             } else {
                 count.increment();
             }
         }
         final BitSet toRemove = new BitSet();
         for (final Map.Entry<Byte, MutableInt> e : occurrences.entrySet()) {
             final Byte v = e.getKey();
             int found = 0;
             for (int i = 0, ct = e.getValue().intValue(); i < ct; i++) {
                 found = indexOf(array, v.byteValue(), found);
                 if (found < 0) {
                     break;
                 }
                 toRemove.set(found++);
             }
         }
         return (byte[]) removeAll(array, toRemove);
     }
 
     /**
      * <p>Removes the elements at the specified positions from the specified array.
      * All remaining elements are shifted to the left.</p>
      *
      * <p>This method returns a new array with the same elements of the input
      * array except those at the specified positions. The component
      * type of the returned array is always the same as that of the input
      * array.</p>
      *
      * <p>If the input array is {@code null}, an IndexOutOfBoundsException
      * will be thrown, because in that case no valid index can be specified.</p>
      *
      * <pre>
      * ArrayUtils.removeAll([1], 0)             = []
      * ArrayUtils.removeAll([2, 6], 0)          = [6]
      * ArrayUtils.removeAll([2, 6], 0, 1)       = []
      * ArrayUtils.removeAll([2, 6, 3], 1, 2)    = [2]
      * ArrayUtils.removeAll([2, 6, 3], 0, 2)    = [6]
      * ArrayUtils.removeAll([2, 6, 3], 0, 1, 2) = []
      * </pre>
      *
      * @param array   the array to remove the element from, may not be {@code null}
      * @param indices the positions of the elements to be removed
      * @return A new array containing the existing elements except those
      *         at the specified positions.
      * @throws IndexOutOfBoundsException if any index is out of range
      * (index < 0 || index >= array.length), or if the array is {@code null}.
      * @since 3.0.1
      */
     public static short[] removeAll(final short[] array, final int... indices) {
         return (short[]) removeAll((Object) array, clone(indices));
     }
 
     /**
      * <p>Removes occurrences of specified elements, in specified quantities,
      * from the specified array. All subsequent elements are shifted left.
      * For any element-to-be-removed specified in greater quantities than
      * contained in the original array, no change occurs beyond the
      * removal of the existing matching items.</p>
      *
      * <p>This method returns a new array with the same elements of the input
      * array except for the earliest-encountered occurrences of the specified
      * elements. The component type of the returned array is always the same
      * as that of the input array.</p>
      *
      * <pre>
      * ArrayUtils.removeElements(null, 1, 2)      = null
      * ArrayUtils.removeElements([], 1, 2)        = []
      * ArrayUtils.removeElements([1], 2, 3)       = [1]
      * ArrayUtils.removeElements([1, 3], 1, 2)    = [3]
      * ArrayUtils.removeElements([1, 3, 1], 1)    = [3, 1]
      * ArrayUtils.removeElements([1, 3, 1], 1, 1) = [3]
      * </pre>
      *
      * @param array  the array to remove the element from, may be {@code null}
      * @param values the elements to be removed
      * @return A new array containing the existing elements except the
      *         earliest-encountered occurrences of the specified elements.
      * @since 3.0.1
      */
     public static short[] removeElements(final short[] array, final short... values) {
         if (isEmpty(array) || isEmpty(values)) {
             return clone(array);
         }
         final HashMap<Short, MutableInt> occurrences = new HashMap<Short, MutableInt>(values.length);
         for (final short v : values) {
             final Short boxed = Short.valueOf(v);
             final MutableInt count = occurrences.get(boxed);
             if (count == null) {
                 occurrences.put(boxed, new MutableInt(1));
             } else {
                 count.increment();
             }
         }
         final BitSet toRemove = new BitSet();
         for (final Map.Entry<Short, MutableInt> e : occurrences.entrySet()) {
             final Short v = e.getKey();
             int found = 0;
             for (int i = 0, ct = e.getValue().intValue(); i < ct; i++) {
                 found = indexOf(array, v.shortValue(), found);
                 if (found < 0) {
                     break;
                 }
                 toRemove.set(found++);
             }
         }
         return (short[]) removeAll(array, toRemove);
     }
 
     /**
      * <p>Removes the elements at the specified positions from the specified array.
      * All remaining elements are shifted to the left.</p>
      *
      * <p>This method returns a new array with the same elements of the input
      * array except those at the specified positions. The component
      * type of the returned array is always the same as that of the input
      * array.</p>
      *
      * <p>If the input array is {@code null}, an IndexOutOfBoundsException
      * will be thrown, because in that case no valid index can be specified.</p>
      *
      * <pre>
      * ArrayUtils.removeAll([1], 0)             = []
      * ArrayUtils.removeAll([2, 6], 0)          = [6]
      * ArrayUtils.removeAll([2, 6], 0, 1)       = []
      * ArrayUtils.removeAll([2, 6, 3], 1, 2)    = [2]
      * ArrayUtils.removeAll([2, 6, 3], 0, 2)    = [6]
      * ArrayUtils.removeAll([2, 6, 3], 0, 1, 2) = []
      * </pre>
      *
      * @param array   the array to remove the element from, may not be {@code null}
      * @param indices the positions of the elements to be removed
      * @return A new array containing the existing elements except those
      *         at the specified positions.
      * @throws IndexOutOfBoundsException if any index is out of range
      * (index < 0 || index >= array.length), or if the array is {@code null}.
      * @since 3.0.1
      */
     public static int[] removeAll(final int[] array, final int... indices) {
         return (int[]) removeAll((Object) array, clone(indices));
     }
 
     /**
      * <p>Removes occurrences of specified elements, in specified quantities,
      * from the specified array. All subsequent elements are shifted left.
      * For any element-to-be-removed specified in greater quantities than
      * contained in the original array, no change occurs beyond the
      * removal of the existing matching items.</p>
      *
      * <p>This method returns a new array with the same elements of the input
      * array except for the earliest-encountered occurrences of the specified
      * elements. The component type of the returned array is always the same
      * as that of the input array.</p>
      *
      * <pre>
      * ArrayUtils.removeElements(null, 1, 2)      = null
      * ArrayUtils.removeElements([], 1, 2)        = []
      * ArrayUtils.removeElements([1], 2, 3)       = [1]
      * ArrayUtils.removeElements([1, 3], 1, 2)    = [3]
      * ArrayUtils.removeElements([1, 3, 1], 1)    = [3, 1]
      * ArrayUtils.removeElements([1, 3, 1], 1, 1) = [3]
      * </pre>
      *
      * @param array  the array to remove the element from, may be {@code null}
      * @param values the elements to be removed
      * @return A new array containing the existing elements except the
      *         earliest-encountered occurrences of the specified elements.
      * @since 3.0.1
      */
     public static int[] removeElements(final int[] array, final int... values) {
         if (isEmpty(array) || isEmpty(values)) {
             return clone(array);
         }
         final HashMap<Integer, MutableInt> occurrences = new HashMap<Integer, MutableInt>(values.length);
         for (final int v : values) {
             final Integer boxed = Integer.valueOf(v);
             final MutableInt count = occurrences.get(boxed);
             if (count == null) {
                 occurrences.put(boxed, new MutableInt(1));
             } else {
                 count.increment();
             }
         }
         final BitSet toRemove = new BitSet();
         for (final Map.Entry<Integer, MutableInt> e : occurrences.entrySet()) {
             final Integer v = e.getKey();
             int found = 0;
             for (int i = 0, ct = e.getValue().intValue(); i < ct; i++) {
                 found = indexOf(array, v.intValue(), found);
                 if (found < 0) {
                     break;
                 }
                 toRemove.set(found++);
             }
         }
         return (int[]) removeAll(array, toRemove);
     }
 
     /**
      * <p>Removes the elements at the specified positions from the specified array.
      * All remaining elements are shifted to the left.</p>
      *
      * <p>This method returns a new array with the same elements of the input
      * array except those at the specified positions. The component
      * type of the returned array is always the same as that of the input
      * array.</p>
      *
      * <p>If the input array is {@code null}, an IndexOutOfBoundsException
      * will be thrown, because in that case no valid index can be specified.</p>
      *
      * <pre>
      * ArrayUtils.removeAll([1], 0)             = []
      * ArrayUtils.removeAll([2, 6], 0)          = [6]
      * ArrayUtils.removeAll([2, 6], 0, 1)       = []
      * ArrayUtils.removeAll([2, 6, 3], 1, 2)    = [2]
      * ArrayUtils.removeAll([2, 6, 3], 0, 2)    = [6]
      * ArrayUtils.removeAll([2, 6, 3], 0, 1, 2) = []
      * </pre>
      *
      * @param array   the array to remove the element from, may not be {@code null}
      * @param indices the positions of the elements to be removed
      * @return A new array containing the existing elements except those
      *         at the specified positions.
      * @throws IndexOutOfBoundsException if any index is out of range
      * (index < 0 || index >= array.length), or if the array is {@code null}.
      * @since 3.0.1
      */
     public static char[] removeAll(final char[] array, final int... indices) {
         return (char[]) removeAll((Object) array, clone(indices));
     }
 
     /**
      * <p>Removes occurrences of specified elements, in specified quantities,
      * from the specified array. All subsequent elements are shifted left.
      * For any element-to-be-removed specified in greater quantities than
      * contained in the original array, no change occurs beyond the
      * removal of the existing matching items.</p>
      *
      * <p>This method returns a new array with the same elements of the input
      * array except for the earliest-encountered occurrences of the specified
      * elements. The component type of the returned array is always the same
      * as that of the input array.</p>
      *
      * <pre>
      * ArrayUtils.removeElements(null, 1, 2)      = null
      * ArrayUtils.removeElements([], 1, 2)        = []
      * ArrayUtils.removeElements([1], 2, 3)       = [1]
      * ArrayUtils.removeElements([1, 3], 1, 2)    = [3]
      * ArrayUtils.removeElements([1, 3, 1], 1)    = [3, 1]
      * ArrayUtils.removeElements([1, 3, 1], 1, 1) = [3]
      * </pre>
      *
      * @param array  the array to remove the element from, may be {@code null}
      * @param values the elements to be removed
      * @return A new array containing the existing elements except the
      *         earliest-encountered occurrences of the specified elements.
      * @since 3.0.1
      */
     public static char[] removeElements(final char[] array, final char... values) {
         if (isEmpty(array) || isEmpty(values)) {
             return clone(array);
         }
         final HashMap<Character, MutableInt> occurrences = new HashMap<Character, MutableInt>(values.length);
         for (final char v : values) {
             final Character boxed = Character.valueOf(v);
             final MutableInt count = occurrences.get(boxed);
             if (count == null) {
                 occurrences.put(boxed, new MutableInt(1));
             } else {
                 count.increment();
             }
         }
         final BitSet toRemove = new BitSet();
         for (final Map.Entry<Character, MutableInt> e : occurrences.entrySet()) {
             final Character v = e.getKey();
             int found = 0;
             for (int i = 0, ct = e.getValue().intValue(); i < ct; i++) {
                 found = indexOf(array, v.charValue(), found);
                 if (found < 0) {
                     break;
                 }
                 toRemove.set(found++);
             }
         }
         return (char[]) removeAll(array, toRemove);
     }
 
     /**
      * <p>Removes the elements at the specified positions from the specified array.
      * All remaining elements are shifted to the left.</p>
      *
      * <p>This method returns a new array with the same elements of the input
      * array except those at the specified positions. The component
      * type of the returned array is always the same as that of the input
      * array.</p>
      *
      * <p>If the input array is {@code null}, an IndexOutOfBoundsException
      * will be thrown, because in that case no valid index can be specified.</p>
      *
      * <pre>
      * ArrayUtils.removeAll([1], 0)             = []
      * ArrayUtils.removeAll([2, 6], 0)          = [6]
      * ArrayUtils.removeAll([2, 6], 0, 1)       = []
      * ArrayUtils.removeAll([2, 6, 3], 1, 2)    = [2]
      * ArrayUtils.removeAll([2, 6, 3], 0, 2)    = [6]
      * ArrayUtils.removeAll([2, 6, 3], 0, 1, 2) = []
      * </pre>
      *
      * @param array   the array to remove the element from, may not be {@code null}
      * @param indices the positions of the elements to be removed
      * @return A new array containing the existing elements except those
      *         at the specified positions.
      * @throws IndexOutOfBoundsException if any index is out of range
      * (index < 0 || index >= array.length), or if the array is {@code null}.
      * @since 3.0.1
      */
     public static long[] removeAll(final long[] array, final int... indices) {
         return (long[]) removeAll((Object) array, clone(indices));
     }
 
     /**
      * <p>Removes occurrences of specified elements, in specified quantities,
      * from the specified array. All subsequent elements are shifted left.
      * For any element-to-be-removed specified in greater quantities than
      * contained in the original array, no change occurs beyond the
      * removal of the existing matching items.</p>
      *
      * <p>This method returns a new array with the same elements of the input
      * array except for the earliest-encountered occurrences of the specified
      * elements. The component type of the returned array is always the same
      * as that of the input array.</p>
      *
      * <pre>
      * ArrayUtils.removeElements(null, 1, 2)      = null
      * ArrayUtils.removeElements([], 1, 2)        = []
      * ArrayUtils.removeElements([1], 2, 3)       = [1]
      * ArrayUtils.removeElements([1, 3], 1, 2)    = [3]
      * ArrayUtils.removeElements([1, 3, 1], 1)    = [3, 1]
      * ArrayUtils.removeElements([1, 3, 1], 1, 1) = [3]
      * </pre>
      *
      * @param array  the array to remove the element from, may be {@code null}
      * @param values the elements to be removed
      * @return A new array containing the existing elements except the
      *         earliest-encountered occurrences of the specified elements.
      * @since 3.0.1
      */
     public static long[] removeElements(final long[] array, final long... values) {
         if (isEmpty(array) || isEmpty(values)) {
             return clone(array);
         }
         final HashMap<Long, MutableInt> occurrences = new HashMap<Long, MutableInt>(values.length);
         for (final long v : values) {
             final Long boxed = Long.valueOf(v);
             final MutableInt count = occurrences.get(boxed);
             if (count == null) {
                 occurrences.put(boxed, new MutableInt(1));
             } else {
                 count.increment();
             }
         }
         final BitSet toRemove = new BitSet();
         for (final Map.Entry<Long, MutableInt> e : occurrences.entrySet()) {
             final Long v = e.getKey();
             int found = 0;
             for (int i = 0, ct = e.getValue().intValue(); i < ct; i++) {
                 found = indexOf(array, v.longValue(), found);
                 if (found < 0) {
                     break;
                 }
                 toRemove.set(found++);
             }
         }
         return (long[]) removeAll(array, toRemove);
     }
 
     /**
      * <p>Removes the elements at the specified positions from the specified array.
      * All remaining elements are shifted to the left.</p>
      *
      * <p>This method returns a new array with the same elements of the input
      * array except those at the specified positions. The component
      * type of the returned array is always the same as that of the input
      * array.</p>
      *
      * <p>If the input array is {@code null}, an IndexOutOfBoundsException
      * will be thrown, because in that case no valid index can be specified.</p>
      *
      * <pre>
      * ArrayUtils.removeAll([1], 0)             = []
      * ArrayUtils.removeAll([2, 6], 0)          = [6]
      * ArrayUtils.removeAll([2, 6], 0, 1)       = []
      * ArrayUtils.removeAll([2, 6, 3], 1, 2)    = [2]
      * ArrayUtils.removeAll([2, 6, 3], 0, 2)    = [6]
      * ArrayUtils.removeAll([2, 6, 3], 0, 1, 2) = []
      * </pre>
      *
      * @param array   the array to remove the element from, may not be {@code null}
      * @param indices the positions of the elements to be removed
      * @return A new array containing the existing elements except those
      *         at the specified positions.
      * @throws IndexOutOfBoundsException if any index is out of range
      * (index < 0 || index >= array.length), or if the array is {@code null}.
      * @since 3.0.1
      */
     public static float[] removeAll(final float[] array, final int... indices) {
         return (float[]) removeAll((Object) array, clone(indices));
     }
 
     /**
      * <p>Removes occurrences of specified elements, in specified quantities,
      * from the specified array. All subsequent elements are shifted left.
      * For any element-to-be-removed specified in greater quantities than
      * contained in the original array, no change occurs beyond the
      * removal of the existing matching items.</p>
      *
      * <p>This method returns a new array with the same elements of the input
      * array except for the earliest-encountered occurrences of the specified
      * elements. The component type of the returned array is always the same
      * as that of the input array.</p>
      *
      * <pre>
      * ArrayUtils.removeElements(null, 1, 2)      = null
      * ArrayUtils.removeElements([], 1, 2)        = []
      * ArrayUtils.removeElements([1], 2, 3)       = [1]
      * ArrayUtils.removeElements([1, 3], 1, 2)    = [3]
      * ArrayUtils.removeElements([1, 3, 1], 1)    = [3, 1]
      * ArrayUtils.removeElements([1, 3, 1], 1, 1) = [3]
      * </pre>
      *
      * @param array  the array to remove the element from, may be {@code null}
      * @param values the elements to be removed
      * @return A new array containing the existing elements except the
      *         earliest-encountered occurrences of the specified elements.
      * @since 3.0.1
      */
     public static float[] removeElements(final float[] array, final float... values) {
         if (isEmpty(array) || isEmpty(values)) {
             return clone(array);
         }
         final HashMap<Float, MutableInt> occurrences = new HashMap<Float, MutableInt>(values.length);
         for (final float v : values) {
             final Float boxed = Float.valueOf(v);
             final MutableInt count = occurrences.get(boxed);
             if (count == null) {
                 occurrences.put(boxed, new MutableInt(1));
             } else {
                 count.increment();
             }
         }
         final BitSet toRemove = new BitSet();
         for (final Map.Entry<Float, MutableInt> e : occurrences.entrySet()) {
             final Float v = e.getKey();
             int found = 0;
             for (int i = 0, ct = e.getValue().intValue(); i < ct; i++) {
                 found = indexOf(array, v.floatValue(), found);
                 if (found < 0) {
                     break;
                 }
                 toRemove.set(found++);
             }
         }
         return (float[]) removeAll(array, toRemove);
     }
 
     /**
      * <p>Removes the elements at the specified positions from the specified array.
      * All remaining elements are shifted to the left.</p>
      *
      * <p>This method returns a new array with the same elements of the input
      * array except those at the specified positions. The component
      * type of the returned array is always the same as that of the input
      * array.</p>
      *
      * <p>If the input array is {@code null}, an IndexOutOfBoundsException
      * will be thrown, because in that case no valid index can be specified.</p>
      *
      * <pre>
      * ArrayUtils.removeAll([1], 0)             = []
      * ArrayUtils.removeAll([2, 6], 0)          = [6]
      * ArrayUtils.removeAll([2, 6], 0, 1)       = []
      * ArrayUtils.removeAll([2, 6, 3], 1, 2)    = [2]
      * ArrayUtils.removeAll([2, 6, 3], 0, 2)    = [6]
      * ArrayUtils.removeAll([2, 6, 3], 0, 1, 2) = []
      * </pre>
      *
      * @param array   the array to remove the element from, may not be {@code null}
      * @param indices the positions of the elements to be removed
      * @return A new array containing the existing elements except those
      *         at the specified positions.
      * @throws IndexOutOfBoundsException if any index is out of range
      * (index < 0 || index >= array.length), or if the array is {@code null}.
      * @since 3.0.1
      */
     public static double[] removeAll(final double[] array, final int... indices) {
         return (double[]) removeAll((Object) array, clone(indices));
     }
 
     /**
      * <p>Removes occurrences of specified elements, in specified quantities,
      * from the specified array. All subsequent elements are shifted left.
      * For any element-to-be-removed specified in greater quantities than
      * contained in the original array, no change occurs beyond the
      * removal of the existing matching items.</p>
      *
      * <p>This method returns a new array with the same elements of the input
      * array except for the earliest-encountered occurrences of the specified
      * elements. The component type of the returned array is always the same
      * as that of the input array.</p>
      *
      * <pre>
      * ArrayUtils.removeElements(null, 1, 2)      = null
      * ArrayUtils.removeElements([], 1, 2)        = []
      * ArrayUtils.removeElements([1], 2, 3)       = [1]
      * ArrayUtils.removeElements([1, 3], 1, 2)    = [3]
      * ArrayUtils.removeElements([1, 3, 1], 1)    = [3, 1]
      * ArrayUtils.removeElements([1, 3, 1], 1, 1) = [3]
      * </pre>
      *
      * @param array  the array to remove the element from, may be {@code null}
      * @param values the elements to be removed
      * @return A new array containing the existing elements except the
      *         earliest-encountered occurrences of the specified elements.
      * @since 3.0.1
      */
     public static double[] removeElements(final double[] array, final double... values) {
         if (isEmpty(array) || isEmpty(values)) {
             return clone(array);
         }
         final HashMap<Double, MutableInt> occurrences = new HashMap<Double, MutableInt>(values.length);
         for (final double v : values) {
             final Double boxed = Double.valueOf(v);
             final MutableInt count = occurrences.get(boxed);
             if (count == null) {
                 occurrences.put(boxed, new MutableInt(1));
             } else {
                 count.increment();
             }
         }
         final BitSet toRemove = new BitSet();
         for (final Map.Entry<Double, MutableInt> e : occurrences.entrySet()) {
             final Double v = e.getKey();
             int found = 0;
             for (int i = 0, ct = e.getValue().intValue(); i < ct; i++) {
                 found = indexOf(array, v.doubleValue(), found);
                 if (found < 0) {
                     break;
                 }
                 toRemove.set(found++);
             }
         }
         return (double[]) removeAll(array, toRemove);
     }
 
     /**
      * <p>Removes the elements at the specified positions from the specified array.
      * All remaining elements are shifted to the left.</p>
      *
      * <p>This method returns a new array with the same elements of the input
      * array except those at the specified positions. The component
      * type of the returned array is always the same as that of the input
      * array.</p>
      *
      * <p>If the input array is {@code null}, an IndexOutOfBoundsException
      * will be thrown, because in that case no valid index can be specified.</p>
      *
      * <pre>
      * ArrayUtils.removeAll([true, false, true], 0, 2) = [false]
      * ArrayUtils.removeAll([true, false, true], 1, 2) = [true]
      * </pre>
      *
      * @param array   the array to remove the element from, may not be {@code null}
      * @param indices the positions of the elements to be removed
      * @return A new array containing the existing elements except those
      *         at the specified positions.
      * @throws IndexOutOfBoundsException if any index is out of range
      * (index < 0 || index >= array.length), or if the array is {@code null}.
      * @since 3.0.1
      */
     public static boolean[] removeAll(final boolean[] array, final int... indices) {
         return (boolean[]) removeAll((Object) array, clone(indices));
     }
 
     /**
      * <p>Removes occurrences of specified elements, in specified quantities,
      * from the specified array. All subsequent elements are shifted left.
      * For any element-to-be-removed specified in greater quantities than
      * contained in the original array, no change occurs beyond the
      * removal of the existing matching items.</p>
      *
      * <p>This method returns a new array with the same elements of the input
      * array except for the earliest-encountered occurrences of the specified
      * elements. The component type of the returned array is always the same
      * as that of the input array.</p>
      *
      * <pre>
      * ArrayUtils.removeElements(null, true, false)               = null
      * ArrayUtils.removeElements([], true, false)                 = []
      * ArrayUtils.removeElements([true], false, false)            = [true]
      * ArrayUtils.removeElements([true, false], true, true)       = [false]
      * ArrayUtils.removeElements([true, false, true], true)       = [false, true]
      * ArrayUtils.removeElements([true, false, true], true, true) = [false]
      * </pre>
      *
      * @param array  the array to remove the element from, may be {@code null}
      * @param values the elements to be removed
      * @return A new array containing the existing elements except the
      *         earliest-encountered occurrences of the specified elements.
      * @since 3.0.1
      */
     public static boolean[] removeElements(final boolean[] array, final boolean... values) {
         if (isEmpty(array) || isEmpty(values)) {
             return clone(array);
         }
         final HashMap<Boolean, MutableInt> occurrences = new HashMap<Boolean, MutableInt>(2); // only two possible values here
         for (final boolean v : values) {
             final Boolean boxed = Boolean.valueOf(v);
             final MutableInt count = occurrences.get(boxed);
             if (count == null) {
                 occurrences.put(boxed, new MutableInt(1));
             } else {
                 count.increment();
             }
         }
         final BitSet toRemove = new BitSet();
         for (final Map.Entry<Boolean, MutableInt> e : occurrences.entrySet()) {
             final Boolean v = e.getKey();
             int found = 0;
             for (int i = 0, ct = e.getValue().intValue(); i < ct; i++) {
                 found = indexOf(array, v.booleanValue(), found);
                 if (found < 0) {
                     break;
                 }
                 toRemove.set(found++);
             }
         }
         return (boolean[]) removeAll(array, toRemove);
     }
 
     /**
      * Removes multiple array elements specified by index.
      * @param array source
      * @param indices to remove, WILL BE SORTED--so only clones of user-owned arrays!
      * @return new array of same type minus elements specified by unique values of {@code indices}
      * @since 3.0.1
      */
     // package protected for access by unit tests
     static Object removeAll(final Object array, final int... indices) {
         final int length = getLength(array);
         int diff = 0; // number of distinct indexes, i.e. number of entries that will be removed
 
         if (isNotEmpty(indices)) {
             Arrays.sort(indices);
 
             int i = indices.length;
             int prevIndex = length;
             while (--i >= 0) {
                 final int index = indices[i];
                 if (index < 0 || index >= length) {
                     throw new IndexOutOfBoundsException("Index: " + index + ", Length: " + length);
                 }
                 if (index >= prevIndex) {
                     continue;
                 }
                 diff++;
                 prevIndex = index;
             }
         }
         final Object result = Array.newInstance(array.getClass().getComponentType(), length - diff);
         if (diff < length) {
             int end = length; // index just after last copy
             int dest = length - diff; // number of entries so far not copied
             for (int i = indices.length - 1; i >= 0; i--) {
                 final int index = indices[i];
                 if (end - index > 1) { // same as (cp > 0)
                     final int cp = end - index - 1;
                     dest -= cp;
                     System.arraycopy(array, index + 1, result, dest, cp);
                     // Afer this copy, we still have room for dest items.
                 }
                 end = index;
             }
             if (end > 0) {
                 System.arraycopy(array, 0, result, 0, end);
             }
         }
         return result;
     }
 
     /**
      * Removes multiple array elements specified by indices.
      * 
      * @param array source
      * @param indices to remove
      * @return new array of same type minus elements specified by the set bits in {@code indices}
      * @since 3.2
      */
     // package protected for access by unit tests
     static Object removeAll(final Object array, final BitSet indices) {
         final int srcLength = ArrayUtils.getLength(array);
         // No need to check maxIndex here, because method only currently called from removeElements()
         // which guarantee to generate on;y valid bit entries.
 //        final int maxIndex = indices.length();
 //        if (maxIndex > srcLength) { 
 //            throw new IndexOutOfBoundsException("Index: " + (maxIndex-1) + ", Length: " + srcLength);
 //        }
         final int removals = indices.cardinality(); // true bits are items to remove
         final Object result = Array.newInstance(array.getClass().getComponentType(), srcLength - removals);
         int srcIndex=0;
         int destIndex=0;
         int count;
         int set;
         while((set = indices.nextSetBit(srcIndex)) != -1){
             count = set - srcIndex;
             if (count > 0) {
                 System.arraycopy(array, srcIndex, result, destIndex, count);
                 destIndex += count;
             }
             srcIndex = indices.nextClearBit(set);
         }
         count = srcLength - srcIndex;
         if (count > 0) {
             System.arraycopy(array, srcIndex, result, destIndex, count);            
         }
         return result;
     }
 }