From: Robert Dober <robert.dober@...>
Date: 2008-06-27T18:38:14+09:00
Subject: Re: Is it ellegant to use a global variable to store a Logger object?

On Fri, Jun 27, 2008 at 10:17 AM, Shot (Piotr Szotkowski) <shot@hot.pl> wrote:
> Iñaki Baz Castillo:
>
>> El Jueves, 26 de Junio de 2008, Shot (Piotr Szotkowski) escribió:
>
>>> module MyProgram
>>>   class Logger
>>>   class << self
>>>     def debug …
>>>       …
>>>     end
>>>   end
>>>   end
>>> end
>
>> Ok, this seems really ellegant and I've tested that I can call
>> "Logger.debug..." in any submodule/subclass into the program :)
>
> :)
>
>> Just a question: Logger must use an instance of a class (real
>> class Logger), so to store it I think the best option is using
>> a @@class_variable into Logger module
>
> No – by using class << self, you're operating on the Logger object
> (an instance of the class Class), and you can access its *instance*
> variables.
<snip>
Amen

grep --recursive '@@' lib && echo "Classvariables are the root of all evil ;)"

Cheers
Robert