From: "David A. Black" <dblack@...>
Date: 2008-06-01T09:16:00+09:00
Subject: Re: Class Module

Hi --

On Sun, 1 Jun 2008, Wesley Silva wrote:

> Thanks a lot David!
>
> I would like to make another question please...:)
>
> If i just change Modules's name for Father for example:
>
> class Father
>  @@docs = {}
>  def doc(str)
>    @@docs[self.name] = self.name + ":\n" + str.gsub(/^\s+/, '')
>  end
>  def Father::show_doc(aClass)
>    aClass = aClass.name if aClass.class <= Module
>    @@docs[aClass] || "No documentation for #{aClass}"
>  end
> end
> class Example<Father
>  doc("This is a sample documentation string")
> end
>
> puts Father::show_doc(Example)
>
> Produces:
>
> undefined method `doc' for Example:Class (NoMethodError)
>
> Can you tell why? :)

doc is an instance method of Father, and Example is not an instance of
Father (it's an instance of Class). So you can't call doc on Example.


David

-- 
Rails training from David A. Black and Ruby Power and Light:
   INTRO TO RAILS         June 9-12            Berlin
   ADVANCING WITH RAILS   June 16-19           Berlin
See http://www.rubypal.com for details and updates!