From: Robert Klemme <bob.news@...>
Date: 2005-10-24T23:02:02+09:00
Subject: Re: How to find all the subclasses of a class?

Pit Capitain wrote:
> Robert Klemme schrieb:
>> 1. Find them when you need them via ObjectSpace:
>> 
>> ObjectSpace.each_object(Module) {|m| subclasses << m if
>> m.ancestors.include? cl} 
> 
> If you want to find subclasses of a *class* instead of a module, you
> can pass the singleton class of the base class:
> 
>    require "enumerator"
> 
>    def get_subclasses(klass)
>      ObjectSpace.enum_for(:each_object, class << klass; self;
>    end).to_a end

Cool!  Didn't know this.  Learn something new every day...  Thanks!

Kind regards

    robert