From: Tobias Peters <tpeters@...>
Date: 2003-04-14T22:58:32+09:00
Subject: Re: [Q] A class, that knows about it's instances + Sets

On Mon, 14 Apr 2003, KONTRA Gergely wrote:
> Or I would be happy, if I can do
> MyClass.each{|a| ... }
> 
> I can do it in one class, BUT, I need it as a module, because I cannot
> subclass my class from that class?

module Instance_Iterator
  include Enumerable
  def each(&block)
    ObjectSpace.each_object(self, &block)
  end
end

MyClass.extend(Instance_Iterator)