From: Joel VanderWerf <vjoel@...>
Date: 2009-08-13T07:05:21+09:00
Subject: Re: Class#descendants?

Tony Arcieri wrote:
> For what it's worth, here's my implementation, which doesn't use
> ObjectSpace.  It's a bit less trivial and I wonder if it could be made
> better:
> 
> http://gist.github.com/166800
> 
> Workarounds for ActiveSupport included, yay!

Not all classes are constants...

my_numbers = Class.new(Numeric)

p Numeric.descendants
a = []
ObjectSpace.each_object(Class) {|cl| a << cl if cl <= Numeric}
p a

-- 
       vjoel : Joel VanderWerf : path berkeley edu : 510 665 3407