May 2019
Intermediate to advanced
464 pages
9h 22m
Japanese
Content preview from Node.jsデザインパターン 第2版
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2
1
章
Node.js
の世界へようこそ
1.1.1
小さなコア
コアシステムは最小限の機能のみ提供し、その他多くの機能は「ユーザーランド」あるいは「ユーザー
スペース」と呼ばれる、コアの外側に形成されたモジュールのエコシステムに任せる、というのが
Node
の基本原則です。この原則は
Node
文化の形成に大きな影響を及ぼしてきました。厳密にコントロール
された進化の遅いコアの開発ペースに引きずられることなく、ユーザーランドで自由に広範な実験を行
い反復的な改良を行うアプローチを取ることができるのです。コアを必要最小限の機能に絞る（ミニマ
リズムに徹する）ことで管理が容易になるだけでなく、エコシステム全体が活性化されます。
1.1.2
小さなモジュール
Node
プログラムを構成する基本単位を「モジュール」と呼び、複数のモジュールが集まってより大き
なアプリケーションやライブラリである「パッケージ」が構成されます。
「パッケージ」と「モジュール」は同じ意味で使われることがあります。これはパッケージ
は通常、エントリポイント（入り口）となるモジュールをもつため、使用する側から見れ
ばパッケージもモジュールも同じであるように見えるためです。
「モジュールは小さく設計するべし」という原則が、
Node
のコミュニティ内で繰り返し説かれていま
す。「小さく設計する」というのはこの場合、コードのサイズが小さいという意味だけではなく、モジュー
ルの担当範囲を最小限にとどめることを意味します。そして、より重要なのは後者なのです
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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.