From: Jim Freeze <jim@...>
Date: 2003-04-04T22:51:02+09:00
Subject: To inherit or to include? That is the question.

Hi

I've been poking around the mailing list looking for
some insight into using inheritance vs module include.
It seems like every time I have a good idea for some
class, I wrangle with this question.

For example:

  class AppMaker
    def main; <stuff>; end
  end
  class MyApp < AppMaker
  end
  MyApp.new.main

or

  module AppMaker
    def main; <stuff>; end
  end
  class MyApp
    include AppMaker
  end
  MyApp.new.main

I cannot see that the two behave that differently.
I'm sure there are some differences. Maybe someone
can help me enumerate them.

Ideally, I would like some set of guidelines to help
me make a choice between these two.

Right now, it's fuzzy to me which one I should use.

Thanks
-- 
Jim Freeze
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"I may not be totally perfect, but parts of me are excellent."
		-- Ashleigh Brilliant