ActionScript 3.0 using closures for event handlers

root.addEventListener("click",
   function ()
   {
      navigateToURL(ClickURLRequest,"_self");
   });

root.removeEventListener("click",
       function ()
       {
          navigateToURL(ClickURLRequest,"_self");
       });

root.removeEventListener("click", function () {} );

function OnClick (e:Event)
 {
     navigateToURL(ClickURLRequest,"_self");
 }

 root.addEventListener("click", OnClick);
 root.removeEventListener("click", OnClick);

addEventListener
(
    Event.ACTIVATE,
    function(event:Event):void
    {
    	(event.target as EventDispatcher).removeEventListener(event.type, arguments.callee)
    }
)

myDispatcher.addEventListener("click", function(event:Event):void
{
    IEventDispatcher(event.target).removeEventListener(event.type, arguments.callee);

    // Whatever else needs doing goes here
});

myLoader.addEventListener("complete", function(event:Event):void
{
    /* Even though the load is asynchronous, having the callback code inline
     * like this instead of scattered around makes it easier to understand,
     * in my opinion. */
});

var closure:Function;

myDispatcher.addEventListener("click", function(event:Event):void
{
    closure = arguments.callee;

    // Whatever else needs doing goes here
});

myDispatcher.removeEventListener("click", closure);

root.removeEventListener("click", arguments.callee );

addSelfDestructiveEventListener('roomRenderer', 'complete', trackAction, 'floorChanged');

private function addSelfDestructiveEventListener(listenee:*, event:String, functionToCall:Function, StringArgs:String):void
{
    this[listenee].addEventListener(event, function(event:Event):void
    	{
    		(event.target as EventDispatcher).removeEventListener(event.type, arguments.callee);
    		functionToCall(StringArgs);
    	})
}

addSelfDestructiveEventListener('roomRenderer', 'complete', trackAction, 'floorChanged');

private function addSelfDestructiveEventListener(listenee:*, event:String, functionToCall:Function, StringArgs:String):void
{
    this[listenee].addEventListener(event, function(event:Event):void
    	{
    		(event.target as EventDispatcher).removeEventListener(event.type, arguments.callee);
    		functionToCall(StringArgs);
    	})
}

var closure:Function = null;
root.addEventListener("click",
   closure = function ()
   {
      navigateToURL(ClickURLRequest,"_self");
   });

root.removeEventListener("click", closure);