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/*
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Adobe Systems Incorporated(r) Source Code License Agreement
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Copyright(c) 2005 Adobe Systems Incorporated. All rights reserved.
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Please read this Source Code License Agreement carefully before using
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the source code.
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Adobe Systems Incorporated grants to you a perpetual, worldwide, non-exclusive,
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no-charge, royalty-free, irrevocable copyright license, to reproduce,
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prepare derivative works of, publicly display, publicly perform, and
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distribute this source code and such derivative works in source or
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object code form without any attribution requirements.
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The name "Adobe Systems Incorporated" must not be used to endorse or promote products
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derived from the source code without prior written permission.
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You agree to indemnify, hold harmless and defend Adobe Systems Incorporated from and
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against any loss, damage, claims or lawsuits, including attorney's
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fees that arise or result from your use or distribution of the source
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code.
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THIS SOURCE CODE IS PROVIDED "AS IS" AND "WITH ALL FAULTS", WITHOUT
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ANY TECHNICAL SUPPORT OR ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING,
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BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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FOR A PARTICULAR PURPOSE ARE DISCLAIMED. ALSO, THERE IS NO WARRANTY OF
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NON-INFRINGEMENT, TITLE OR QUIET ENJOYMENT. IN NO EVENT SHALL MACROMEDIA
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OR ITS SUPPLIERS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOURCE CODE, EVEN IF
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ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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package com.adobe.utils
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{
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/**
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* Class that contains static utility methods for manipulating and working
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* with Arrays.
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*
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* Note that all APIs assume that they are working with well formed arrays.
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* i.e. they will only manipulate indexed values.
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*
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* @langversion ActionScript 3.0
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* @playerversion Flash 9.0
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* @tiptext
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*/
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public class ArrayUtil
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{
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/**
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* Determines whether the specified array contains the specified value.
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*
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* @param arr The array that will be checked for the specified value.
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*
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* @param value The object which will be searched for within the array
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*
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* @return True if the array contains the value, False if it does not.
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*
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* @langversion ActionScript 3.0
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* @playerversion Flash 9.0
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* @tiptext
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*/
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public static function arrayContainsValue(arr:Array, value:Object):Boolean
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{
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return (arr.indexOf(value) != -1);
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}
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/**
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* Remove all instances of the specified value from the array,
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*
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* @param arr The array from which the value will be removed
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*
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* @param value The object that will be removed from the array.
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*
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* @langversion ActionScript 3.0
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* @playerversion Flash 9.0
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* @tiptext
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*/
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public static function removeValueFromArray(arr:Array, value:Object):void
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{
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var len:uint = arr.length;
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for(var i:Number = len; i > -1; i--)
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{
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if(arr[i] === value)
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{
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arr.splice(i, 1);
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}
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}
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}
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/**
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* Create a new array that only contains unique instances of objects
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* in the specified array.
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*
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* Basically, this can be used to remove duplication object instances
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* from an array
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*
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* @param arr The array which contains the values that will be used to
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* create the new array that contains no duplicate values.
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*
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* @return A new array which only contains unique items from the specified
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* array.
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*
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* @langversion ActionScript 3.0
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* @playerversion Flash 9.0
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* @tiptext
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*/
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public static function createUniqueCopy(a:Array):Array
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{
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var newArray:Array = new Array();
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var len:Number = a.length;
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var item:Object;
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for (var i:uint = 0; i < len; ++i)
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{
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item = a[i];
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if(ArrayUtil.arrayContainsValue(newArray, item))
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{
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continue;
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}
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newArray.push(item);
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}
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return newArray;
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}
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/**
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* Creates a copy of the specified array.
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*
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* Note that the array returned is a new array but the items within the
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* array are not copies of the items in the original array (but rather
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* references to the same items)
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*
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* @param arr The array that will be copies
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*
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* @return A new array which contains the same items as the array passed
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* in.
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*
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* @langversion ActionScript 3.0
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* @playerversion Flash 9.0
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* @tiptext
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*/
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public static function copyArray(arr:Array):Array
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{
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return arr.slice();
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}
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/**
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* Compares two arrays and returns a boolean indicating whether the arrays
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* contain the same values at the same indexes.
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*
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* @param arr1 The first array that will be compared to the second.
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*
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* @param arr2 The second array that will be compared to the first.
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*
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* @return True if the arrays contains the same values at the same indexes.
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False if they do not.
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*
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* @langversion ActionScript 3.0
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* @playerversion Flash 9.0
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* @tiptext
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*/
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public static function arraysAreEqual(arr1:Array, arr2:Array):Boolean
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{
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if(arr1.length != arr2.length)
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{
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return false;
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}
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var len:Number = arr1.length;
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for(var i:Number = 0; i < len; i++)
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{
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if(arr1[i] !== arr2[i])
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{
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return false;
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}
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}
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return true;
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}
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}
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}
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