One thing about inheritance: It's not necessarily a good way to model things. Often it's a procrustean bed where you try to twist your concepts into what the la

One thing about inheritance: It's not necessarily a good way to model things. Often it's a procrustean bed where you try to twist your concepts into what the language will let you express. I've seen a lot of people use inheritance to save keystrokes. "I can save time if Plane inherits from Bus, they've both got wheels, after all." That's a kind of "typing" system . . . but not the kind that people expect :-) Honestly, the world does not often cleanly decompose into a class tree. Usually it's pretty messy.