From: Robert Klemme <bob.news@...>
Date: 2004-09-02T17:35:27+09:00
Subject: Re: accessing superclass variables


"Nicolaj Soendberg Madsen" <nicolaj@cs.aau.dk> schrieb im Newsbeitrag
news:Pine.GSO.4.58.0409020937480.13526@fire2.cs.aau.dk...
Exactly!
That was my question. I would still appreciate any effort to explain me
how it works :)

Note though that the concept of nested class is something completely
different from sub class!  The general advice is to use accessor methods
although you can access them directly.  Consider this:

class Super
  attr_accessor :foo

  class Nested
    def recommended(super_obj)
      super_obj.foo
    end

    def direct(super_obj)
      super_obj.instance_variable_get "@foo"
    end
  end
end

class Sub < Super
  def direct; @foo; end
  def recommended; foo; end
end


?> sub = Sub.new
=> #<Sub:0x102d4de8>
>> sub.foo = "bar"
=> "bar"
>> sub.direct
=> "bar"
>> sub.recommended
=> "bar"
>> nest = Super::Nested.new
=> #<Super::Nested:0x102cf220>
>> nest.direct(sub)
=> "bar"
>> nest.recommended(sub)
=> "bar"


On Thu, 2 Sep 2004, Mohammad Khan wrote:

> I am not sure what you wanted to know from your question.
>
> Are you asking
> How a variable of super class can be accessed from its sub-class?
>
>
> Thanks
> Mohammad
>
> On Wed, 2004-09-01 at 11:40, Nicolaj Soendberg Madsen wrote:
> > How do I access an outer variable from within a nested class?
> >
> > Is it possible to directly access them?

Regards

    robert