It's a nice little list. My one nitpick is that he referred to to the class extension [1] as an anonymous category and while it also has been called this it's g

It's a nice little list. My one nitpick is that he referred to to the class extension [1] as an anonymous category and while it also has been called this it's generally documented as a class extension by Apple and so it makes sense to call that out so folks can go read about how it actually works. [1] http://goo.gl/zTu3nA http://goo.gl/zTu3nA