This post originated from an RSS feed registered with Ruby Buzz by Jay Fields. Original Post: Ruby: Move a Method From a Class to a Module Definition Feed Title: Jay Fields Thoughts Feed URL: http://feeds.feedburner.com/jayfields/mjKQ Feed Description: Blog about Ruby, Agile, Testing and other topics related to software development. Latest Ruby Buzz Posts Latest Ruby Buzz Posts by Jay Fields Latest Posts From Jay Fields Thoughts

class Speaker
  def say_hello
    "hello"
  end
end

module EnglishSpeaker
  expects_method = Speaker.instance_method(:say_hello)
  define_method :say_hello do |*args|
    expects_method.bind(self).call(*args)
  end
end

class Speaker
  undef say_hello
end

Speaker.new.say_hello # => -:18: undefined method `say_hello' for #<Speaker:0x285b4> (NoMethodError)
Speaker.new.extend(EnglishSpeaker).say_hello # => "hello"