Symbols

Hi,

Is it possible to have and pass into a function a method which exists inside a module?

I have shared/reused function in a module, and would like to pass to a function. For example:

_timer = new Timer.Timer();

		_timer.start(method(:MyModule.update), 1000, true);

When I've tried this, I get symbol not found on 'update'

Thanks
Chris

travis.vitek over 9 years ago

method() is resolving to a member function of the class you are calling from. You've essentially written self.method(:MyModule.update), which doesn't make any sense.

If you want a Lang.Method for a function named update() in another object, call obj.method(:update). If you want to call a module function, use new Lang.Method(MyModule, :update).

Travis

chrishares over 9 years ago

method() is resolving to a member function of the class you are calling from. You've essentially written self.method(:MyModule.update), which doesn't make any sense.

If you want a Lang.Method for a function named update() in another object, call obj.method(:update). If you want to call a module function, use new Lang.Method(MyModule, :update).

Travis

Thanks Travis. I am now getting the error "UnexpectedTypeException: Expected Method, given Class definition" when using Lang.Method(MyModule, :update)

Any ideas?

travis.vitek over 9 years ago

I'm guessing that you missed the new keyword in my quote. The following should work.

var updateCallback = new Lang.Method(MyModule, :update);



// just to prove you can invoke it

updateCallback.invoke();

Travis