mixin test

gistfile1.rb

module Foo
  def a1
    puts "a1: I am a #{self.class.name}"
  end
  def Foo.a2
    puts "a2: I am a #{self.class.name}"
  end
  def self.a3
    puts "a3: I am a #{self.class.name}"
  end
end

class Bar
  include Foo # Foo gets "mixed in"
  def run
    a1
    Foo.a2
    Foo.a3
  end
end

Bar.new.run