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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Simple Factory
の定義
Simple Factory
は、実際にはデザインパターンではありません。強いて言えばプログ
ラミングのイディオム（慣用句）のようなものです。しかし、
Simple Factory
は一般的
に使われているので、
Head First
パターン特別賞を進呈したいと思います。開発者の中
には、この
Simple Factory
のことを「
Factory
パターン」と勘違いしている人もいますが、
次回そのような開発者に出会ったら、間違いを指摘して自分の知識をさりげなく示すこ
とができます。だからといって、間違いを指摘する際に傲慢になってはいけません。
Simple Factory
が「本当の」パターンではなくても、どのように組み立てられている
か確認しておくべきでしょう。では、新しいピザ店のクラス図を確認しましょう。
Simple Factory
はほんの肩慣らしだと考えてください。次に、（どちらもファクトリで
ある）
2
つの強力なパターンを紹介します。でも心配しないでください。まだまだピザ
は登場します。
ピザを作成するファクトリです。アプ
リケーションの中で具象
Pizza
クラス
を参照する唯一の部分であるべきです。
ファクトリのクライアント
です。この
PizzaStore
は、
SimplePizzaFactory
を介して
ピザのインスタンスを取得しま
す。
SimplePizzaF
actory
createPizza()
Pizza
PizzaStore
orderPizza()
ClamPizza
VeggiePizza ...
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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.