From: dblack@...
Date: 2006-02-22T00:39:01+09:00
Subject: Re: "exporting" module methods

Hi --

On Wed, 22 Feb 2006, Mark Volkmann wrote:

> On 2/21/06, dblack@wobblini.net <dblack@wobblini.net> wrote:
>
>> I don't think that's what Xavier wanted; I think he wanted C to be
>> able to call M.croak.  (Also, in your example, c doesn't respond to
>> croak.)
>
> Wow!  I have a fundamental misunderstanding of mixins apparently. I
> see that you are correct. c doesn't respond to croak in the following
> code. However, I don't understand why. Doesn't the include add
> instance methods from the module M to the class C?
>
> module M
>  def self.croak
>    puts 'croak'
>  end
> end
>
> class C
>  include M
> end
>
> c = C.new
> c.croak

Yes, but croak isn't an instance method :-)  (Note the "self." part.)


David

-- 
David A. Black (dblack@wobblini.net)
Ruby Power and Light (http://www.rubypowerandlight.com)

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