AS3 Check if a derrived class function exists

programming flash
1

Hi

I have a little question. Is there a way to check if a derrived class contains a function. If so, call it otherwise keep going.

Quick exemple :

“myClass.as”

package{
	public class myClass extends mySuperClass{
		public function myClass(){
			if(this["myExistingFunction"]!=null)this["myExistingFunction"]();
			if(this["someFunction"]!=null)this["someFunction"]();
		}
	};
}

“mySuperClass.as”

package{
	public class mySuperClass{
		public function muSuperClass(){}
		public function myExistingFunction(){ trace("this function exists!"); }
	}
}

main code

new myClass();

When Flash checks a function that does not exists, its throws the error “ReferenceError: Error #1069” (5th line of myClass.as in the exemple).

Any ideas to perfoms the check without getting the error?

Simon