From: JP Billaud <jp.billaud@...>
Date: 2011-03-07T08:15:01+09:00
Subject: Module Mixin & Class Variables

Hey,

I would like to understand better what happens when one includes a
module with class variables inside a class.

===

module MyModule

  @@test = "test"

  def self.my_test
    puts "From Module"
    puts @@test.object_id
  end
end

class B
  include MyModule

  def self.my_test
    puts "From Class"
    puts @@test.object_id
  end
end

B.my_test
MyModule.my_test

> From Class
> -607833218
> From Module
> -607833218

===

Doing so, the output shows that in both cases the @@test object is the
same. Does someone have the big picture about class variables look up
while mixin a module inside a class?

Thanks,

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