package { import flash.display.*; import flash.text.*; /* @author Takashi Murai(KAYAC) */ [SWF(width="400", height="400", frameRate="24", backgroundColor="#FFFFFF")] public class Main extends Sprite { public var txt:TextField; public function Main() { init(); } public function init():void{ txt = new TextField(); txt.width = 400; txt.height = 400; addChild(txt); txt.appendText("ExclamationMark Tips"+"\n"); txt.appendText("http://level0.kayac.com/2009/06/post_26.php"+"\n"+"\n"); txt.appendText("!null = "+String(Boolean(!null))+"\n"); txt.appendText("!!null = "+String(Boolean(!!null))+"\n"); txt.appendText("!undefined = "+String(Boolean(!undefined))+"\n"); txt.appendText("!!undefined = "+String(Boolean(!!undefined))+"\n"); } } }