From: Trans <transfire@...>
Date: 2008-03-07T03:32:52+09:00
Subject: Re: Double colon vs module block



On Mar 6, 1:21 pm, Daniel Mendler <dmend...@wurzelteiler.de> wrote:
> Hi!
>
> I am new to ruby. I have a question concerning namespaces. Is there a
> difference between using the double colon operator or a module block?
> Example:
>
> module Library
>   class Book
>   end
> end
>
> vs.
>
> class Library::Book
> end

The later will give an error if Library isn't yet defined (personally
I with is would just auto-instantiate a new module). Also the lookup
of constants resolves differently. For example:

  module Library
    SOMETHING = "whatever"
  end

  class Library::Book
    SOMETHING  #=> NameError: uninitialized constant
  end

But I _think_ this has been fixed in Ruby 1.9... Can someone confirm
that?

T.