From: Martin DeMello <martindemello@...>
Date: 2005-07-25T13:20:58+09:00
Subject: Re: Abstract class or interface?

James Edward Gray II <james@grayproductions.net> wrote:
 
> Obviously, there are great uses for classes and modules when you do  
> need to share some implementation.  However, in Ruby loosen your  
> strangle hold on interface.  You'll be surprised what it can do for you.

One other use case:

widgets.each {|w| w.bg = 0xffffff if Button === w}

martin