From: Jim Freeze <jim@...>
Date: 2001-12-09T23:14:31+09:00
Subject: [ruby-talk:28028] Design question: Module or Inheritance

Is there any preference over the two methods
below for adding functionality to a class?

If I needed to append some functionality to a
particular method in B, then I think Method 2
would be required so that super could be called.
Choosing method 1 would limit this ability.

However, Method 1 gives me the ability to inherit
from another class and still provide the functionality
of Method 2.


## === METHOD 1 ====
module B
  def initialize
    # ... do stuff
  end
  def other_funcs
    # ...
  end
end#module A

class A
  include B
end#class A

or

## === METHOD 2 ====
class B
  def initialize
    # ... do stuff
  end
  def other_funcs
    # ...
  end
end#class B

class A < B
end#class A


=========================================================
Jim Freeze
jim@freeze.org
---------------------------------------------------------
Today is a fine day for Ruby programming.
http://www.freeze.org
=========================================================