Example decorator pattern in Ruby using simple delegate

decorator_pattern.rb

class Person
  attr_accessor :first_name, :last_name
  def initialize(first_name, last_name)
   self.first_name = first_name
   self.last_name = last_name
  end
end

require 'delegate'
class PersonDecorator < SimpleDelegator
  def full_name
   "#{first_name} #{last_name}"
  end
end

person = Person.new('Sean', 'Brady')
PersonDecorator.new(person).full_name