key chain with meta-programming

key_chain.rb

class KeyChain
  def initialize(door)
    @door = door
  end

  def get
    send(door)
  end

  private

  attr_reader :door

  def bedroom
    "algorithm of bedroom key" * 3
  end

  def front_door
    "algorithm of front_door key" * 3
  end

  def bathroom
    "algorithm of bathroom key" * 3
  end
end