Ruby - Methods and Classes: Getting Organized(Attribute writers and readers)

Head First Ruby

開発環境

• OS X El Capitan - Apple (OS)
• Emacs (Text Editor)
• Ruby 2.3 (プログラミング言語)

Head First Ruby (Jay McGavren (著)、O'Reilly Media)のChapter 2.(Methods and Classes: Getting Organized)、POOL PUZZLE(No. 1424)を取り組んでみる。

POOL PUZZLE(No. 1424)

コード(Emacs)

#!/usr/bin/env ruby2.3
# -*- coding: utf-8 -*-

class Robot
  def head
    @head
  end

  def arms=(value)
    @arms = value
  end

  attr_reader :legs, :body
  attr_writer :eyes
  attr_accessor :feet

  def assemble
    @legs = "RubyTek Wlkers"
    @body = "BurlyBot Frame"
    @head = "SuperAI 9000"
  end

  def diagnostic
    puts @arms
    puts @eyes
  end
end

robot = Robot.new

robot.assemble

robot.arms = "MagGrip Claws"
robot.eyes = "X-Ray Scopes"
robot.feet = "MagGrip Boots"

puts robot.head
puts robot.legs
puts robot.body
puts robot.feet
robot.diagnostic

入出力結果(Terminal)

$ ./sample3.rb
SuperAI 9000
RubyTek Wlkers
BurlyBot Frame
MagGrip Boots
MagGrip Claws
X-Ray Scopes
$