Flash / Flex / ActionScript/Array/Array Utilties

Class that contains static utility methods for manipulating and working with Arrays

   <source lang="java">

/*

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package com.adobe.utils {

 /**
 *   Class that contains static utility methods for manipulating and working
 *  with Arrays.
 * 
 *  Note that all APIs assume that they are working with well formed arrays.
 *  i.e. they will only manipulate indexed values.  
 * 
 *   @langversion ActionScript 3.0
 *  @playerversion Flash 9.0
 *  @tiptext
 */    
 public class ArrayUtil
 {
       
   /**
   *  Determines whether the specified array contains the specified value.  
   * 
   *   @param arr The array that will be checked for the specified value.
   *
   *  @param value The object which will be searched for within the array
   * 
   *   @return True if the array contains the value, False if it does not.
   *
   *   @langversion ActionScript 3.0
   *  @playerversion Flash 9.0
   *  @tiptext
   */      
   public static function arrayContainsValue(arr:Array, value:Object):Boolean
   {
     return (arr.indexOf(value) != -1);
   }  
   
   /**
   *  Remove all instances of the specified value from the array,
   * 
   *   @param arr The array from which the value will be removed
   *
   *  @param value The object that will be removed from the array.
   *
   *   @langversion ActionScript 3.0
   *  @playerversion Flash 9.0
   *  @tiptext
   */    
   public static function removeValueFromArray(arr:Array, value:Object):void
   {
     var len:uint = arr.length;
     
     for(var i:Number = len; i > -1; i--)
     {
       if(arr[i] === value)
       {
         arr.splice(i, 1);
       }
     }          
   }
   /**
   *  Create a new array that only contains unique instances of objects
   *  in the specified array.
   *
   *  Basically, this can be used to remove duplication object instances
   *  from an array
   * 
   *   @param arr The array which contains the values that will be used to
   *  create the new array that contains no duplicate values.
   *
   *  @return A new array which only contains unique items from the specified
   *  array.
   *
   *   @langversion ActionScript 3.0
   *  @playerversion Flash 9.0
   *  @tiptext
   */  
   public static function createUniqueCopy(a:Array):Array
   {
     var newArray:Array = new Array();
     
     var len:Number = a.length;
     var item:Object;
     
     for (var i:uint = 0; i < len; ++i)
     {
       item = a[i];
       
       if(ArrayUtil.arrayContainsValue(newArray, item))
       {
         continue;
       }
       
       newArray.push(item);
     }
     
     return newArray;
   }
   
   /**
   *  Creates a copy of the specified array.
   *
   *  Note that the array returned is a new array but the items within the
   *  array are not copies of the items in the original array (but rather 
   *  references to the same items)
   * 
   *   @param arr The array that will be copies
   *
   *  @return A new array which contains the same items as the array passed
   *  in.
   *
   *   @langversion ActionScript 3.0
   *  @playerversion Flash 9.0
   *  @tiptext
   */      
   public static function copyArray(arr:Array):Array
   {  
     return arr.slice();
   }
   
   /**
   *  Compares two arrays and returns a boolean indicating whether the arrays
   *  contain the same values at the same indexes.
   * 
   *   @param arr1 The first array that will be compared to the second.
   *
   *   @param arr2 The second array that will be compared to the first.
   *
   *  @return True if the arrays contains the same values at the same indexes.
     False if they do not.
   *
   *   @langversion ActionScript 3.0
   *  @playerversion Flash 9.0
   *  @tiptext
   */    
   public static function arraysAreEqual(arr1:Array, arr2:Array):Boolean
   {
     if(arr1.length != arr2.length)
     {
       return false;
     }
     
     var len:Number = arr1.length;
     
     for(var i:Number = 0; i < len; i++)
     {
       if(arr1[i] !== arr2[i])
       {
         return false;
       }
     }
     
     return true;
   }
 }

}

       </source>