From: "David A. Black" <dblack@...>
Date: 2009-01-20T21:49:29+09:00
Subject: Re: class << self

Hi --

On Tue, 20 Jan 2009, Sijo Kg wrote:

> Hi
>   I have code like
>
>   class A
>     class <<self
>        def first
>         -------
>        end
>        def second
>          ------
>         end
>      end
>    end
>
>    What I understood is now the def first and second becomes class
> methods of class A..Am I right? Is that its only use?

class << object puts you in a class definition block for the singleton
class of object. Creating class methods is the most common use case,
but it works on any object (other than a few built-ins that aren't
allowed to have singleton classes).


David

-- 
David A. Black / Ruby Power and Light, LLC
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