From: "ara.t.howard" <ara.t.howard@...>
Date: 2007-11-09T02:45:31+09:00
Subject: Re: alternate to case; generating a list of sub-classes


On Nov 8, 2007, at 6:08 AM, Robert Klemme wrote:

>
>
> I usually do this when I want to also recursively track subclasses:
>
> module Hierarchy
>   def inherited(cl)
>     superclass.instance_eval { inherited cl }
>     (@children ||= []) << cl
>     cl.extend Hierarchy
>   end
>
>   attr_reader :children
> end
>
> class Foo
>   extend Hierarchy
> end
>
> class Bar < Foo
> end
>
> class Dice < Bar
> end
>
> p Bar.children
> p Foo.children
>
> Cheers
>
> robert
>
> -- 
> use.inject do |as, often| as.you_can - without end
>

http://drawohara.tumblr.com/post/18708641

;-)

a @ http://codeforpeople.com/
--
it is not enough to be compassionate.  you must act.
h.h. the 14th dalai lama