From: "David A. Black" <dblack@...>
Date: 2005-03-16T20:34:00+09:00
Subject: Re: [ruby2] will '@@' disapear in ruby2?

Hi --

On Wed, 16 Mar 2005, Csaba Henk wrote:

> On 2005-03-15, Lionel Thiry <lthiryidontwantspam@skynetnospam.be> wrote:
>>> Anyway, the short answer as far as I know is "no" :-)
>> Too bad! :)
>
> I do like having them. In fact, they are globals, wrapped in the
> namespace of a class/module. There are situations when you need such a
> beast, and it's better than an explicit global... and better than using a
> container as a constant (just because constans don't like being
> reassigned), that's really ugly.
>
> My problem is that you can't really access them from the outside, unless
> accessor method are set up. By "from the outside" I mean that from code
> which is not in the scope of a "class/module Foo ... end" thingy.

You can always use class_eval or instance_eval.  I think part of the
point is that they're specific to that scope.

> Does anyone know, eg, how to define a class variable in a nameless
> class?

Do you mean like:

   def class_factory
     return Class.new { @@x = 1 }
   end

   class_factory.class_eval { puts @@x }   # 1


David

-- 
David A. Black
dblack@wobblini.net