Actionscript - Call function from string (callback)

Question

Hopefully this is simple.
I have a function that has a string passed into it. The
string is the name of the function I will need to call a little
later on.
If I have a string that is named after a function how do I
use it to call that function?
Example:
public function someFunction(functionName:String):void
//do whatever
//at this point I need to somehow call the function that is
held in the string functionName
functionName() //obviously this doesn't work, what needs to
happen here?
}

Answer 1

If you have access to an instance of the class that the
function is part of, you can do the following:
public function someFunction(fnName:String, inst:Object):void
var fn:Function = inst[fnName];
fn();
If you don't want to deal with functions associated with an
object, you can just pass around standalone anonymous functions:
public function someFunction2(fn:Function) {
fn();
someFunction2( function():void {
trace("Yo");
Hope that helps!
- Peter