September 2011
Intermediate to advanced
612 pages
15h 48m
Japanese
Content preview from Making Software ―エビデンスが変えるソフトウェア開発
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,
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.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.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.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.
261
戦闘へ
よりも、スタイルを一貫させることの方がより重要です。
本研究では、整形プログラム
indent
†
を各システムのソースコードに適用し、
indent
が修正を行っ
た行数を数えることで、各システムのスタイルの一貫性を測定しました。その結果が表
15-4
の一番上
のデータです。
indent
の動作は、各種のオプションを使うことで、各種整形スタイルガイドラインに
合わせられます。たとえば、字下げの量や括弧の置き方を詳しく指定できるのです。各システムの整形
スタイルを決定して適切な整形オプションを使うようにするために、まず最初に
15
個の数値フラグを
さまざまな値に、
55
個の論理値フラグを
on
か
off
かに設定した状態で（例
15-2
と
15-3
のシェルスク
リプト参照）、
indent
を各システム上で実行します。そして、既存ファイルの整形と一致する行数が最
も多いフラグ群を選びました。
OpenSolaris
のソースコードの例だと、デフォルトのフラグ設定のまま
の
indent
では
74%
の行が整形し直しになります。フラグを適切に設定すると（
-i8 -bli0 -cbi0 -ci4
-ip0 -bad -bbb -br -brs -ce -nbbo -ncs -nlp -npcs
）、それが
16%
にまで縮小しました。
表
15-4
コードスタイルのメトリクス
メトリック 理想
FreeBSD Linux Solaris WRK
スタイル遵守の行の割合（
%
）↑
77.27
77.96
84.32
33.30
スタイル遵守の
typedef ...
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,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
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.