From: Rich Kilmer <rich@...>
Date: 2001-10-27T07:12:44+09:00
Subject: [ruby-talk:23548] RE:  Fast reply needed: class var trouble



> -----Original Message-----
> From: Robert Feldt [mailto:feldt@ce.chalmers.se]
> Sent: Friday, October 26, 2001 6:06 PM
> To: ruby-talk ML
> Subject: [ruby-talk:23544] Fast reply needed: class var trouble
> 
> 
> Ok its getting late over here in sweden and I'm tired. Can someone please
> explain why this happens:
> 
> class T
>   attr_accessor :t
> 
>   @@default_t = proc{|n| n.inspect}
> 
>   def initialize
>     set_default
>   end
> 
>   def set_default
>     t = @@default_t

you forgot the @ sign (@t=@@default_t)


>   end
> end

> 
> t = T.new
> p t.t         #=> nil
> 
> class T
>   def set_default
>     @t = @@default_t
>   end
> end
> 
> t2 = T.new
> p t2.t        #=> #<Proc_0xa0389c0>
> 
> class T2
>   @@t = 1
>   def t
>     @@t
>   end
> end
> 
> p T2.new.t  #=> 1
> 
> Why not a proc when t.t when it works as I'd expect in later cases?
> 
> Regards,
> 
> Robert
>