January 2018
Intermediate to advanced
408 pages
9h 18m
Japanese
Content preview from 初めてのPerl 第7版
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.
137
7.8 Unicode 属性
マッチしますが、本物の文字クラスはきっかり
1
文字にだけマッチします。
詳しくは
8
章で説明します。ここで述べたことよりは少し複雑です。
7.7.2
ショートカットの否定
これまでに紹介した
3
つのショートカットの反対を表す文字クラスが欲しいことがあります。
つまり、非数字
[^\d]
、非ワード文字
[^\w]
、非空白文字
[^\s]
を表すショートカットがあれば便
利です。
Perl
は、これらを表すショートカット
─
\D
、
\W
、
\S
、
\V
─
を用意しています。これら
は、対応する小文字のショートカットにマッチしない文字
1
個とマッチします。■
表
7-2
ASCII
文字クラスのショートカット
ショートカット マッチするもの
\d
数字
\D
数字以外
\s
空白文字
\S
空白文字以外
\h
水平方向の空白文字（
Perl 5.10
以降）
\H
水平方向の空白文字以外（
Perl 5.10
以降）
\v
垂直方向の空白文字（
Perl 5.10
以降）
\V
垂直方向の空白文字以外（
Perl 5.10
以降）
\R
あらゆる種類の行末（
Perl 5.10
以降）
\w
いわゆる「ワード」文字
\W
いわゆる「ワード」文字以外
\n
改行文字（実際はショートカットではない）
\N
改行文字以外（
Perl 5.18
以降）
これらのショートカットは、文字クラスの代わりとして使うことも、文字クラスを定義するブ
ラケットの内側で使うこともできます。例えば、
[\s\d]
は空白文字と数字にマッチします。文字
クラスを組み合わせた別の例は
[\d\D]
です。これは、数字あるいは非数字にマッチします ...
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.