From: burke <burke.libbey@...>
Date: 2010-01-26T13:20:05+09:00
Subject: Re: Is there a way to list the classes defined in a module?

> Castle.constants

Pretty much. This will also return any other constants you make in the
namespace -- for example, if you had Castle::Location = "Scotland",
you'd also get "Location" back. If that causes you problems, you can
do:

irb(main):034:0> Castle.constants.select{|e|Castle.const_get
(e).kind_of? Class}
=> ["King", "Guard", "Queen", "Dragon_keeper", "Royalty", "Commoner"]