Ruby Fundamental - Módulos como mixin

modulos_como_mixin_01.rb

module CoolModule
  def do_something
    "I did it!"
  end
end

class SomeClass
  include CoolModule
end

my_class = SomeClass.new
my_class.do_something # => "I did it!"

modulos_como_mixin_02.rb

class OtherClass
  include Enumerable, Comparable
end

modulos_como_mixin_03.rb

module CoolModule
  def do_something
    "I did it!"
  end
end

module Other
  include CoolModule

  def check_task(task)
    "#{task}? #{do_something}"
  end
end

class SomeClass
  include Other
end

my_class = SomeClass.new
my_class.do_something # => "I did it!"
my_class.check_task("Wash the car") # => "Wash the car? I did it!"

modulos_como_mixin_04.rb

module Information
  attr :title

  def initialize(title)
    @title = title
  end
end

class Article
  include Information
end

article = Article.new("Um título")
article.title # => "Um título"

modulos_como_mixin_05.rb

module Information
  attr :title

  def initialize(title)
    @title = title
  end
end

class Page
  include Information

  def initialize(title)
    @title = "Page: #{super(title)}"
  end
end

page = Page.new("Outro título")
page.title # => "Page: Outro título"

modulos_como_mixin_06.rb

module Information
  def initialize(title)
    @information_title = title
  end

  def title
    @information_title
  end
end