Method Chaining for instance and class

gistfile1.rb

class Person
  def name(value)
    @name = value
    self
  end
  def age(value)
    @age = value
    self
  end
  def introduce
    puts "Hello, my name is #{@name} and I am #{@age} years old."
  end
end

> person = Person.new
# => #<Person:0x007ff202829e38>
> person.name('Baz')
# => #<Person:0x007ff202829e38 @name="Baz">
> person.name('Baz').age(21)
# => #<Person:0x007ff202829e38 @name="Baz", @age=21>


class Speaker
  class << self
    def say(what)
      @say = what
      self
    end
    def drink(what)
      @drink = what
      self
    end
    def output
      "The speaker drinks #{@drink} and says #{@say}"
    end
  end
end

> Speaker.say('hello').drink('water').output
# => The speaker drinks water and says hello

module SpeakerClassMethods
  def say(what)
    @say = what
    self
  end
  def drink(what)
    @drink = what
    self
  end
  def output
    "The speaker drinks #{@drink} and says #{@say}"
  end
end
class Speaker
  extend SpeakerClassMethods
end

> Speaker.say('hello').drink('water').output
# => The speaker drinks water and says hello