From: James Edward Gray II <james@...>
Date: 2006-02-22T00:13:21+09:00
Subject: Re: "exporting" module methods

On Feb 21, 2006, at 8:31 AM, Xavier Noria wrote:

> Is there standard idiom to add module methods to classes that mixin  
> them? (Heh, is "mixin" also a verb in Ruby?)
>
> That is, I would like class C to croak:
>
>   module M
>     def self.croak
>       puts "croak!"
>     end
>   end
>
>   class C
>     include M
>     croak
>   end

I tend to do it like this:

Module M
   extend self  # duplicate instance methods as class methods

   def croak
     puts "Croak!"
   end
end

class C
   extend M  # class-level mixin
   croak
end

Hope that helps.

James Edward Gray II