From: "David A. Black" <dblack@...>
Date: 2009-12-20T04:18:13+09:00
Subject: Re: special cased?

Hi --

On Sat, 19 Dec 2009, Roger Pack wrote:

> This confused me a bit
>
> class A
> @a = 2
> @@a = 3
> def self.a
>   puts [@a, @@a]
> end
> end
>
> class B < A; end
>
> A.a # [2, 3]
> B.a # [nil, 3]
>
> shouldn't @a just lookup @@a in the parent?  Different treatment for
> different types of variables?

I think you mean shouldn't it just look up @a (not @@a) in the parent
-- and the answer is no :-) A and B are different objects, and
therefore do not share instance variables.


David

-- 
David A. Black
Senior Developer, Cyrus Innovation Inc.
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