From: G Brandon Hoyt <qrprat77@...>
Date: 2010-09-23T20:30:11+09:00
Subject: Re: to make dot method dot method work?

On 09/23/2010 05:17 AM, Pen Ttt wrote:
> here is the class
> class  Mycompute
>   def initialize(str)
>     @str=str
>    end
>   def values
>     @@result=@str
>    end
>    def up
>      @@result.upcase
>    end
> end
> irb(main):012:0> Mycompute.new("Abc").values
> => "Abc"
> irb(main):013:0>
> irb(main):014:0* Mycompute.new("Abc").up
> => "ABC"
> irb(main):015:0> Mycompute.new("Abc").values.up
> NoMethodError: undefined method `up' for "Abc":String
>   from (irb):15
>   from :0
> 
> would you tell me how to fix it to make
> Mycompute.new("Abc").values.up  output  "ABC"?
 The most obvious way I see to do it is to use an object attribute
instead of a class attribute.  in other words, @result instead of
@@result.  Is there a reason why you want to use a class attribute in
this instance?  A class attribute is not an attribute of the object.