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Initializing Instance Variables Defined by a Module (written by Phil Tomson)
CodeExpectedActual
module Timeable
 attr_reader :time_created
  def initialize
    @time_created = Time.now
  end
  def age      #in seconds
    Time.now - @time_created
  end
end
class Character
  include Timeable
  attr_reader :name
  def initialize( name )
    @name = name
    super() #calls Timeable's initialize
  end
end
c = Character.new "Fred"
c.time_created
 Mon Mar 27 18:34:31 EST 2006 Mon Mar 27 18:40:20 EST 2006 
Character.ancestors
 [Character, Timeable, Object, Kernel] [Character, Timeable, Object, Kernel]