Self-Destroying EventLisener in Flex / AS

It so happened that I was working on a Flex project ...

Task:
Make a "one-time" EventListener.

Problem:
How? :)

Solution (spherical example in vacuum):
')
MXML part:

<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" initialize="init()">
<!-- -->
<mx:Button id="button1" />
</mx:Application>


AS-part:
private function init():void{
var onClick: Function = function ( event :MouseEvent):void{
trace( "event handled" );
button1.removeEventListener(MouseEvent.CLICK, onClick);
}
button1.addEventListener(MouseEvent.CLICK, onClick);
}

* This source code was highlighted with Source Code Highlighter .


private function init():void{
var onClick: Function = function ( event :MouseEvent):void{
trace( "event handled" );
button1.removeEventListener(MouseEvent.CLICK, onClick);
}
button1.addEventListener(MouseEvent.CLICK, onClick);
}

* This source code was highlighted with Source Code Highlighter .


private function init():void{
var onClick: Function = function ( event :MouseEvent):void{
trace( "event handled" );
button1.removeEventListener(MouseEvent.CLICK, onClick);
}
button1.addEventListener(MouseEvent.CLICK, onClick);
}

* This source code was highlighted with Source Code Highlighter .

As a result, the button is clicked once. Hooray!