Callbacks, Ruby-style

demo.rb

q1 = Question.new("What is the color of my eyes?", "blue")
q1.ask do |answer|
  answer.correct { puts "Nice!" }
  answer.incorrect { puts "LOL" }
end

question.rb

class Question
  def initialize(question, correct_answer)
    @question = question
    @correct_answer = correct_answer
  end

  def ask
    puts @question
    answer = gets.chomp
    if correct?(answer)
      yield CorrectAnswer.new
    else
      yield IncorrectAnswer.new
    end
  end

  def correct?(answer)
    answer == @correct_answer
  end
end

class Answer
  def correct
  end

  def incorrect
  end
end
class CorrectAnswer < Answer
  def correct
    yield
  end
end
class IncorrectAnswer < Answer
  def incorrect
    yield
  end
end