Количество ссылок на объект

[Zebestov]

package 
{
	import flash.display.Sprite;
	import flash.events.Event;
	import flash.events.MouseEvent;
 
	public class Main extends Sprite 
	{
		private var a:LinkHolder;
		private var b:LinkHolder;
		private var c:LinkHolder;
		private var d:LinkHolder;
		private var e:LinkHolder;
		private var f:LinkHolder;
 
		public function Main():void 
		{
			if (stage) init();
			else addEventListener(Event.ADDED_TO_STAGE, init);
		}
 
		private function init(e:Event = null):void 
		{
			removeEventListener(Event.ADDED_TO_STAGE, init);
			// entry point
 
			this.a = new LinkHolder();
			this.b = new LinkHolder();
			this.c = new LinkHolder();
			this.d = new LinkHolder();
			this.e = new LinkHolder();
			this.f = new LinkHolder();
 
			this.a.link = this.d;
			this.b.link = this.c;
			this.c.link = this.f;
			this.d.link = this.b;
			this.e.link = this.a;
			this.f.link = this.e;
 
			stage.addEventListener(MouseEvent.CLICK, this.onClickHandler);
		}
 
		private function onClickHandler(e:MouseEvent):void
		{
			this.a = null;
			this.b = null;
			this.c = null;
			this.d = null;
			this.e = null;
			this.f = null;
			// запускаем GC и наблюдаем исчезновение
			// всех 6 экземпляров LinkHolder
		}
 
	}
 
}

та шо ж такое =)