ActionScript 3 AS3：提取没有扩展名的文件名

Posted 2021-05-23

package{
  import flash.display.Sprite;
  
  public class Main extends Sprite{
    public function Main(){

        var filename:String = "document.jpg";
        var extensionIndex:Number = filename.lastIndexOf( '.' );
        
        var extensionless:String = filename.substr( 0, extensionIndex ); 
        trace( "The filename is " + extensionless );


    }
  }
}