From: Carl Youngblood <carl@...>
Date: 2003-11-30T05:07:09+09:00
Subject: Re: Class-level readers and writers

> (Just as a footnote, you can also use "normal" accessor shortcuts at
> the class object level:
> 
>   class A
>     class << self
>       attr_accessor :x
>     end
>   end
> 
>   A.x = 1   # and so on
> 
> which is implemented with instance variables rather than class
> variables, if for any reason that suits your purposes better.)

I'm still trying to figure out what this does, exactly.  Is A.x an 
instance variable or a class variable?  If I have something like:

a = A.new

And I say:

a.x = 1

Is that modifying a class variable or an instance variable?  Or does 
that even work?  I just want to make sure that the accessor will work if 
called on either an instance or on the class itself.

Thanks,
Carl