in response to http://stackoverflow.com/questions/15432131/pass-by-reference-is-not-working-in-actionscript

PassByReference.as

package passByReference
{
  /**
	 * @author creynder
	 */
	public class PassByReference{
		public function PassByReference()
		{
			var receiver : Receiver = new Receiver();
			trace( receiver.counter ); //outputs "1"
			setCounter( receiver );
			trace( receiver.counter ); //outputs "10"
		}

		private function setCounter( receiver : Receiver ) : void{
			receiver.counter = 10;
		}
	}
}

internal class Receiver{
	public var counter : int = 1;
}