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
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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.
602
14
章
Chain of Responsibility
パターン
Chain of Responsibility
パターン
要求処理の機会を複数のオブジェクトに与えたい場合には、Chain of Responsibility
パターンを使いましょう。
シナリオ
Mighty Gumball
社は、
Java
で動くガムボール
マシンをリリースして以来、処理しきれないほど
多くの電子メールを受け取っています。同社独自
の分析によれば、電子メールは次の
4
種類に分類
できます。
10
人に
1
人当たるゲームを愛する顧
客からのファンメール、ゲーム中毒になっている
子供の親からの苦情、新たな場所にマシンを置い
てほしいという要望、そしてかなりの量のスパム
メールです。
ファンメールは
CEO
に直接伝え、苦情は法務
担当部門へ、新たなマシンの要望はビジネス開発
部門に届けたいのです。そしてスパムメールは削
除します。
あなたの任務
Mighty Gumball
社は、メールがスパムか、ファ
ンメールか、苦情か、あるいは要望かを判別す
る
AI
検出プログラムをすでに書いています。
Mighty Gumball
社は、この検出プログラムを
使って受信した電子メールを処理する設計をあ
なたに行ってほしいそうです。
Java
ガムボールマシ
ンのリリース以来、膨大なメールを
受け取っている。この処理を手伝って
くれないか？
you are here
603
14
章 付録
Chain of Responsibility
パターンの利点
●
要求の送信者と受信者を分離する。 ...
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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.