From: Robert Klemme <shortcutter@...>
Date: 2009-05-20T17:51:03+09:00
Subject: Re: Super super ?

2009/5/20 F. Senault <fred@lacave.net>:

> That being said, you could work in the Father class like this to obtain
> the wanted result :
>
>
> class Father < Grand_father
>  def say_hello
>    super
>    puts "Father : Hello" unless self.is_a? Son
>  end
> end

Frankly, I find that even worse than my hack.  The reason: now Father
needs to know something about a sub class so we have a circular
dependency.  That's usually a bad thing to have.  Consider, all these
classes are in different files and someone only needs Father and
Grand_father: code will break in Father because Son is undefined.
It's ok if Son knows something about his parents but not otherwise.

Kind regards

robert


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