pseudocode example for LordNed

gistfile1.as

package
{
  import org.flixel.*;

  public class PlayState extends FlxState
  {
    private var somethingPrivate:Number = 0;
    private var player:Player;

    override public function create():void {
      player = new Player(0,0);
      player.addOnJumpCallback(function():void { somethingPrivate += 5; });
    }
  }
}

package
{
  import org.flixel.*;

  public class Player extends FlxSprite
  {
    var callbacks:Array = new Array();

    public function jump():void {
      for each(var callback:Function in callbacks) {
        callback();
      }
    }

    public function addOnJumpCallback(callback:Function) {
      callbacks.push(callback);
    }

    public override function update():void {
      if(FlxG.keys.X) jump();
    }
  }
}