Ruby mixin overriding instance methods.

gistfile1.rb

#!/usr/bin/env ruby
#
# Example showing how to make including a mixin override instance methods.
#

module TalksLikeMrT
  def self.included(klass)
    (klass.instance_methods & self.instance_methods).each do |method|
      klass.instance_eval{remove_method method.to_sym}
    end
  end

  def say_your_name
    puts "My name is #{name}, fool!"
  end
end

class Person
  def name
    "Mr. T"
  end

  def say_your_name
    puts name
  end
  
  # Try commenting out this line. You'll get just the name. Put it back in,
  # and you get it said like Mr. T.
  include TalksLikeMrT
end

Person.new.say_your_name