Ruby Modules

include

module BasicFunctions
  def eat
    puts "I am chewing!"
  end

  def drink
    puts "Slurp! Slurp! Slurp!"
  end

  def sleep
    puts "Zzzzzzzzzzzzzzzzz!"
  end
end

# file: cat.rb

require './basic_functions'

class Cat
  include BasicFunctions
end

# file: dog.rb

require './basic_functions'

Class Dog
  include BasicFunctions
end

# file: human.rb

require './basic_functions'

Class Human
  include BasicFunctions
end
copy

extend

require './basic_functions'

class Cat
  extend BasicFunctions
end

Class Dog
  extend BasicFunctions
end

Class Human
  extend BasicFunctions
end

# another file
require './cat'
require './dog'
require './human'

Cat.eat
Cat.drink
Cat.sleep

Dog.eat
Dog.drink
Dog.sleep

Human.eat
Human.drink
Human.sleep
copy