From: Joel VanderWerf <vjoel@...>
Date: 2005-01-20T02:17:43+09:00
Subject: Re: Fwd: [suby-ruby] Your all time desired fundemental Ruby mod

Martin DeMello wrote:
> Joel VanderWerf <vjoel@path.berkeley.edu> wrote:
> 
>>class RadioButton < Button
>>   # ...
>>   self.background = RED
>>end
>>
>>p Button.background   # ==> RED
>>
>>The change went up the inheritance tree. Is this what you wanted? (Maybe 
>>it is, and I didn't follow the discussion up to this point...)
> 
> 
> That is what I wanted, but now my head hurts trying to figure out why it
> works :) Isn't RadioButton a separate object from Button, and as such
> shouldn't it have its own copy of all instance variables?

I snipped too much... the storage for #background was a constant called 
BACKGROUND (or something) whose value was an array of the form [RED], so 
that binding would be inherited from Button to RadioButton.