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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you are here
539
12
章
Compound
パターン
Strategy
パターンを探究する
Strategy
パターンをさらにもう少し掘り下げて、
MVC
の中
でどのように使われているのかをもっと理解しましょう。さ
らに、使いやすい別のパターンも取り上げます。
MVC
トリオ
でよく見かける
Adapter
パターンです。
DJ
ビューが何をしているか、少し考えてみてください。
DJ
ビューはビート速度と振動を表示します。これは何かに似て
いませんか？
心臓の鼓動に似ていませんか？
偶然にもここに
心臓モニタークラスがあります。
getHeartRate()
registerBeatObserver()
registerBPMObserver()
//
他の心臓メソッド
HeartModel
現在の心拍数を取得するメソッド
を持ちます。
幸運にも、この開発者はビートと
BPM
のオブザー
バインタフェースについて知っていました！
HeartModel
で現在のビューを再利用すれば確かに素晴らしいでしょうが、このモデルと連動するコントローラが必要です。
また、
HeartModel
のインタフェースには
getBPM()
ではなく
getHeartRate()
メソッドがあるため、現在のビューが求め
ているものとは一致しません。このビューを新しいモデルで再利用できるようにするには、クラスをどのように設計すればよ
いでしょうか？
あなたのクラス設計のアイデアを書き出してください。
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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.