From: Rong <ron.green@...>
Date: 2009-09-08T13:40:03+09:00
Subject: Mixins

I have the following code separated in 2 files.

module UsefulFeatures

  def class_name
    self.class.to_s
    end
end

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

require UsefulFeatures

class Person
  include UsefulFeatures
end


x = Person.new
puts x.class_name

Every time I try to run this I get the following error:
Test2.rb:1:in `<main>': uninitialized constant UsefulFeatures
(NameError)

What am I doing wrong?