From: Ryan Davis <ryand-ruby@...>
Date: 2010-02-02T06:38:56+09:00
Subject: Re: Module children


On Feb 1, 2010, at 13:06 , Aaron Patterson wrote:

> On Tue, Feb 02, 2010 at 04:50:34AM +0900, Camille Roux wrote:
>> Hello,
>> 
>> I'd like to get the list of all the classes contained in a module.
>> What's the simple way to do that?
> 
>>> module Foo; A = 1; class B; end; module C; end end
> => nil
>>> Foo.constants.find_all { |k| Class === Foo.const_get(k) }
> => ["B"]

Personally, I usually map first:

>> Foo.constants.map { |s| Foo.const_get s }.find_all { |k| Class === k }
=> [Foo::B]