From: Robert Klemme <shortcutter@...>
Date: 2012-06-26T20:10:42+09:00
Subject: Re: class << self VS extend self

On Tue, Jun 26, 2012 at 1:40 AM, Aleksey Zapparov <ixti@member.fsf.org> wrote:
> What's the difference between subject?

The comparison does not really make much sense IMHO since both do very
different things:

"class <<self ... end" opens the singleton class of the instance
referenced to by "self".

"extend self" only works if "self" references a module.  It will
include a module's instance methods in the module instance itself -
making them class methods.

Cheers

robert

-- 
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/