From: Sebastian Hungerecker <sepp2k@...>
Date: 2008-09-30T18:32:39+09:00
Subject: Re: extend keyword in class definition

ruud grosmann wrote:
> I am a bit surprised by the 'extend Forwardable' line. Can anybody
> explain me what this is? Is it the same as 'include Forwardable' or is
> it the same as 'class WriterDecorator < Forwardable'?

No, it's the same as WriterDecorator.extend Forwardable or
class <<WriterDecorator
  include Forwardable
end
I.e. the module gets included in the singelton class of WriterDecorator, not 
in WriterDecorator itself (or in other words: the module's methods get added 
as singleton methods of the class instead of as instance methods)

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