September 2014
Intermediate to advanced
336 pages
7h 53m
Japanese
Content preview from アンダースタンディング コンピュテーション ―単純な機械から不可能なプログラムまで
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Ruby
ひとめぐり
1
1
章
Ruby
ひとめぐり
本書のコードはRubyで書かれています。Rubyはシンプルで親しみやすく、書いていて楽しくなる
よう設計されたプログラミング言語です。私はその明瞭さと柔軟さに魅かれてRubyを選びましたが、
本書にはRuby独自の機能に依存しているところはありません。そのため、もしあなたにとってわかり
やすくなるなら、本書のサンプルコードをお好みの言語、特にPythonやJavaScriptといった動的言
語に変換してもよいでしょう。
本書のサンプルコードはすべて、Ruby 2.0とRuby 1.9のどちらでも動きます。Rubyの公式サイト
（http://ruby-lang.org）にはRubyに関する詳しい情報があり、そこから実装をダウンロードできます。
まずはRubyの機能について簡単に見ていきましょう。ここでは本書で使っている部分にフォーカス
します。Rubyについてさらに学びたければ、オライリーの『Ruby Programming Language』（邦訳：
オライリー・ジャパン『プログラミング言語 Ruby』）を読むことをおすすめします。
すでに
Ruby
についてよく知っているなら、２章までスキップしても構いません。
1.1
対話型
Ruby
シェル
Rubyの親しみやすい機能のひとつは、対話型コンソール（IRB）です。IRBにRubyコードを入力す
ると、即座にその結果を確認することができます。本書では至るところでIRBを利用して、対話的に
コードを書きながら、そのコ
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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.