From: Erik Veenstra <erikveen@...>
Date: 2006-07-10T19:33:34+09:00
Subject: Re: instance_exec

Okay, criticizing somebody's work without providing a
"solution", isn't nice at all...

So, here's my version...

gegroet,
Erik V. - http://www.erikveen.dds.nl/

PS: I'm still curious about the reason for using a module.

----------------------------------------------------------------

 class Object
   def instance_exec(*args, &block)
     object      = self
     res         = nil

     class << self
       self
     end.instance_eval do
       begin
         Thread.critical = true
         @_instance_exec_count_ ||= 0
         @_instance_exec_count_ += 1
         method_name = "_instance_exec_#{@_instance_exec_count_}_"
       ensure
         Thread.critical = false
       end

       begin
         define_method(method_name, &block)

         res = object.send(method_name, *args)
       ensure
         remove_method(method_name) rescue nil
       end
     end

     res
   end
 end

----------------------------------------------------------------