actionscript 找出数组中相同元素

    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]);                 }              }          }      }