From: Gregory Seidman <gsslist+ruby@...>
Date: 2008-03-07T03:33:46+09:00
Subject: Re: Double colon vs module block

On Fri, Mar 07, 2008 at 03:25:40AM +0900, Sebastian Hungerecker wrote:
> Daniel Mendler wrote:
> > Is there a
> > difference between using the double colon operator or a module block?
> 
> No, there is not.

Yes, there is.

If module A is not defined, then the following will fail:

module A::B
  #...
end

...whereas the following will simply define module A...

module A
  module B
    #...
  end
end

--Greg