Example of metaprogramming

gistfile1.rb

class QuestionRow
  def initialize(internal_id: nil, chapter: nil, position: nil, text: nil, images: nil, video: nil, explanation: nil,
                 error_points: nil, prerequisite_id: nil, external_id: nil, choices: nil)
    method(__method__).parameters.each do |type, name|
      if type == :key
        instance_variable_set "@#{name}", eval("#{name}")
        self.class.class_eval { attr_reader name}
      end
    end
  end
end