From: Joel VanderWerf <joelvanderwerf@...>
Date: 2010-06-23T04:49:22+09:00
Subject: Re: Got to be a better way to code class variables....

Dave Howell wrote:
> class Smee
> 	extend SmeeCore # including it for the _class_
> 	include SmeeCore # including it for the _instances_
> end

If you want the extend to happen automatically when you include a 
module, you can define an included method on M that does it:

module M
   def foo
     "FOO"
   end
   def self.included(c)
     c.extend M
   end
end

class C
   include M
end

p C.foo
p C.new.foo