From: ara.t.howard@...
Date: 2006-05-11T15:11:58+09:00
Subject: Re: plz help with binding

On Thu, 11 May 2006, Sergey Volkov wrote:

> Now I'm trying to create instance-var-less storage:

an even trickier way:

   harp:~ > cat a.rb
   class C
     def self.arr_meth m
       m = m.to_s
       define_method(m) do
         singleton_class =
           class << self
             self
           end
         singleton_class.module_eval do
           a = []
           define_method m, lambda{ a }
         end
         send m # recurse into newly defined method
       end
     end

     arr_meth :arm
   end

   ca = C.new; ca.arm << 10
   cb = C.new; cb.arm << 20

   p ca.arm #-> [10, 20]
   p cb.arm #-> [10, 20]
   p( ca.arm.eql?( cb.arm ) ) #-> true

   harp:~ > ruby a.rb
   [10]
   [20]
   false


-a
-- 
be kind whenever possible... it is always possible.
- h.h. the 14th dali lama