From: Xavier Noria <fxn@...>
Date: 2006-11-17T18:48:07+09:00
Subject: Re: newbie question about attr_reader

On Nov 16, 2006, at 1:01 PM, dblack@wobblini.net wrote:

>   class C
>     class << self
>       attr_accessor :x
>     end
>   end
>
> Now, the class object C has an attribute "x":
>
>   C.x = 1
>   puts C.new.class.x   # 1

David, technically is there any relationship between the attribute @x  
here

   class A
     @x = 1
   end

and the @x that accessor deals with? That would be an attribute of  
what? Is there a singleton instance of the singleton class? Or is  
that @x an attribute of A as instance of Class? I tried to get this  
right with examples but I guess the exact answer comes from the  
actual implementation.

-- fxn

fxn@feynman:~/tmp$ cat foo.rb
class A
   @x = 0
   @y = 1
   class << self
     def x
       @x
     end
     attr_accessor :y
   end
end

puts A.x, A.y
fxn@feynman:~/tmp$ ruby foo.rb
0
1