August 2025
Beginner to intermediate
552 pages
7h 58m
Japanese
Content preview from 初めてのGo言語 第2版 ―他言語プログラマーのためのイディオマティックGo実践ガイドBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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付録B実例で学ぶGo言語入門
武舎 広幸
ほかの言語（特にCやC++）をある程度ご存じの方のための、サンプルプログラム集です。原著の最初のほうの章には、まとまったコードがあまり書かれていないので、以下に示す例題をざっと読んでおくと、Goの世界に馴染んで、本文の内容がわかりやすくなると思います。
訳者が原著を始めとする本などの情報を元に、これまでの経験から、できるだけわかりやすいと思う方法で書いてみました。訳者自身がタイムマシンでGo言語を学ぶ前に戻ってこれを読んだら、「おかげで随分楽ができる」と思える内容にしたつもりです。
- 括弧内に記載された章や節のタイトルは、詳しい情報が記載されている場所を示しています
- JavaScript、Pythonなど型やポインタが表に出てこない言語が得意の方には、「2章 事前宣言された型」と6章の「6.1 ポインタ入門」と「6.2 ポインタを恐れる必要はない」に詳しい説明があるので一読をお勧めします。
- サンプルプログラムは本文の例題と同様、GitHubで公開しています（https://musha.com/go2。書籍では省略したものもあります）
B.1 予備知識
まず、サンプルコードを読むための予備知識です。
B.1.1 Go言語のコードの留意点
本稿のコードを読んだり試したりする上で、特に次の点に留意してください。なお、「付録A Go言語のまとめ」には、より詳しい説明があります。さらに詳しくは、索引や目次などを頼りに本文を参照してください。
- 変数名を先に、型の指定は後に書く。たとえば整数型の変数
aを宣言するには「var a int」とする if文やfor文の条件などは(...)で囲まないで書く- ループは
for文だけ。whileやdo-while ...
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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.