June 2022
Beginner to intermediate
672 pages
17h 23m
Japanese
Content preview from Head Firstデザインパターン 第2版 ―頭とからだで覚えるデザインパターンの基本
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
416
10
章
補充練習
危うく忘 れ るところだった！
最初の仕様に書き忘れた遷移が
1
つあります。ガムボールマシンのガムボールが
なくなったときに補充する手段が必要です！
これが新しい図です。これを実装し
てもらえますか？
ガムボールマシンの他の部分でとても素晴らしい仕事をしてき
たので、これもきっとすぐに追加できると信じています！
−
Mighty Gumball
社エンジニア
ガムボール
>
0
ガムボール
なし
25
セント
受領
25
セント
を投入する
25
セントを
取り出す
ハンドルを回す
25
セント
未受領
ガムボール
を出す
ガムボール
販売
ガムボール
=0
ガムボールマシンが
半分空になることは
ありません
補充
you are here
417
10
章
State
パターン
見事な仕事をしてくれたね！
ガム
ボール業界を変えるようなアイデ
アがさらに思い浮かんだので、そ
れを実装してほしいんだ。シーッ！
そのアイデアは次章で紹介するよ。
ガムボールマシン用の
refill()
メソッドを書く必要があります。このメソッドは
1
つ
の引数（マシンに追加するガムボール数）を取り、ガムボールマシンのカウントを
更新してマシンの状態をリセットします。
418
10
章
誰が何をする？
パターン
説明
State
Strategy
Template
Method
交換可能な振る舞いをカプセル化し、委 ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.