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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612
14
章
Prototype
パターン
シナリオ
あなたの開発した対話型のロールプレイングゲームでは、モンスターに並々ならぬ力
を注いでいます。ヒーローが動的に作られた景観の中を旅しながら、次々に現れる敵を
倒していきます。あなたは景観の変化に伴いモンスターの特徴を進化させたいと考えて
います。鳥のようなモンスターが登場人物を海底まで追いかけていくのは、あまり意味
がありません。最終的には、上級プレイヤーが独自のモンスターを作れるようにしたい
と思っています。
Prototype
パターン
あるクラスのインスタンス作成にコストがかかったり複雑だったりす
る場合、Prototypeパターンを使いましょう。
モンスター作成の詳細を処理する
コードと、実際にインスタンスをその場
で作成するために必要なコードを分離で
きれば、かなりすっきりするね。
このようなさまざまなモンスターのイン
スタンスを作成する作業だけでもとても大変
よ。状態の詳細すべてをコンストラクタに押し込むの
は、凝集度が高いとは思えないわ。インスタンス化の
詳細のすべてをカプセル化できる
1
つの場所が
あれば素晴らしいんだけど。
you are here
613
14
章 付録
<<interface>>
Monster
救いの手を差し伸べる
Prototype
パターン ...
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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.