Euler 4

/**
 * Copyright enecre ( http://wonderfl.net/user/enecre )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/na9o
 */

// forked from enecre's Euler3
// forked from enecre's forked from: Euler6
// forked from enecre's Euler6
// forked from enecre's Euler2
package {
    import flash.events.Event;
    import flash.text.TextField;
    import flash.display.Sprite;
    public class Euler extends Sprite {
        private var tf:TextField = new TextField();
        public function Euler() {
            // write as3 code here..
            tf.height = 465;
            addChild(tf);
            ans.x = 200;
            ans.height = 465;
            addChild(ans);
            init();
        }
        
        private var a:int = 1000;
        private var b:int = 0;
        private var ans:TextField = new TextField();
        
        public function init():void{
            addEventListener(Event.ENTER_FRAME, onEnterFrame);
        }
        
        private function onEnterFrame(e:Event):void{
            if(b <= 0){
                if(a == 0)removeEventListener(Event.ENTER_FRAME,onEnterFrame);
                else{
                    a--;
                    b = 1000;
                }
            }
            b--;
            var c:String = String(a * b);
            tr(b);
            var len:int = c.length;
            //if(len <= 5)return;
            if(c.charAt(0) == c.charAt(len - 1) &&
               c.charAt(1) == c.charAt(len - 2) &&
               c.charAt(2) == c.charAt(len - 3) 
               ){
                addAns(c, a, b);
            }
        }

        private function addAns(...o:Array):void{
            ans.appendText(o + "\n");
            ans.scrollV = ans.maxScrollV;
        }

        
        private function tr(...o:Array):void{
            tf.appendText(o + "\n");
            tf.scrollV = tf.maxScrollV;
        }

    }
}