4 ms·The stuff you mix in has code. Interfaces do not.by skj 12y agoThe stuff you mix in has code. Interfaces do not.jhasse 12y agoWhat code do you mean? He only wrote "pass". I guess I'm confused because he still used inheritance.skj 12y agoThere was a place to write code. In this example, obviously, none was written. But interfaces leave no opportunity.