Ruby attribute initialiser

attributes.rb

class Attributes < Module
  def initialize(*attr_names)
    @attr_names = attr_names
    define_method :attributes { attr_names }
  end
  
  private
  
  def included(base)
    super
    base.send :include, Initializer
    base.send :attr_accessor, *@attr_names
  end
  
  module Initializer
    def initialize(**attrs)
      super()
      attrs.each { |k,v| send("#{key}=", val) if respond_to? "#{key}=" }
      yield self if block_given?
    end
  end
end

example.rb

class Book
  include Attributes.new(:title, :author, :pages)
end

Book.new(author: "David Foster Wallace", title: "Infinity Jest", pages: 1079)
Book.new(title: "Brave New World") do |b|
  b.author = "Aldous Huxley"
  b.pages = 288
end