actionscript 找到数组中相同元素

    var array:Array = [1,5,5,2];  
    function delSameElm(arr:Array):void
    {  
        for (var i:int = 0; i<=arr.length; i++)  
        {  
            for (var j:int=i+1; j<arr.length; j++)  
            {  
                if (arr[i] === arr[j])  
                {  
                    trace(arr[i]); 
                }  
            }  
        }  
    }