flash on 2013-3-11

/**
 * Copyright hacker_tmbt9fl2 ( http://wonderfl.net/user/hacker_tmbt9fl2 )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/vgBh
 */

package {
    import flash.text.TextFormat;
    import flash.text.TextField;
    import flash.display.Sprite;
    public class FlashTest extends Sprite {
        private var _time:Number;
        
        public function FlashTest() {
            // write as3 code here..
            var txt:TextField = new TextField();
            var fmt:TextFormat = new TextFormat(null, 20);
            txt.defaultTextFormat = fmt;
            txt.width = stage.stageWidth;
            txt.x = txt.y = 20;
            addChild(txt);
            
            var b:Boolean = (checkio([1, 2, 3, 1, 3]) == [1, 3, 1, 3]);
            txt.text = String(b);
            
            var msg:String = ": result = " + checkio([1, 2, 3, 1, 3]);
            txt.appendText(msg);
        }
        
        private function checkio(arr:Array):Array
        {
            var res:Array = [];
            
            var unique:Object = {};
            var listA:Array = arr.concat();
            
            var i:int;
            for (i = 0; i < listA.length; i++)
            {
                var key:int = listA[i];
                unique[key] = 0;
                if (!(key in unique)) 
                {
                    unique[key] += 1;
                    if (unique[key] >= 1) res.push(key);
                }
            }

            
            return res;
        }

    }
}