Perl - 正規表現の世界(マッチ変数, キャプチャ)

初めてのPerl 第6版
(オライリージャパン)
Randal L. Schwartz (著) brian d foy (著)
Tom Phoenix (著), 近藤 嘉雪 (翻訳)

開発環境

• OS X Mavericks - Apple(OS)
• BBEdit - Bare Bones Software, Inc., Emacs (Text Editor)
• Perl (プログラミング言語)

初めてのPerl 第6版 (Randal L. Schwartz (著)、brian d foy (著)、Tom Phoenix (著)、近藤 嘉雪 (翻訳)、オライリージャパン)、8章(正規表現によるマッチ)の8.10(練習問題)3.を解いてみる。

その他参考書籍

• プログラミングPerl〈VOLUME1〉
• プログラミングPerl〈VOLUME2〉
• Perlクックブック〈VOLUME1〉
• Perlクックブック〈VOLUME2〉

8.10(練習問題)3.

コード(BBEdit, Emacs)

sample190_3.pl

#!/usr/bin/env perl
# use diagnostics;
use strict;
use warnings;
use 5.016;
use utf8;
binmode STDIN, ':utf8';
binmode STDOUT, ':utf8';
binmode STDERR, ':utf8';

while (<>) {
    chomp;
    if (/\b(.*a)\b/) {
        say "Matched: |$`<$&>$'|";
        say "\$1 contains '$1'";
    } else {
        say "No match: |$_|";
    }
}

入出力結果(Terminal)

$ ./sample190_3.pl temp.txt
No match: |A|
Matched: |<a>|
$1 contains 'a'
Matched: |<kamimura>'s blog|
$1 contains 'kamimura'
Matched: |<http://sitekamimura>.blogspot.com|
$1 contains 'http://sitekamimura'
No match: |KMI|
Matched: |<http://www.mkamimura>.com|
$1 contains 'http://www.mkamimura'
No match: |frederick|
Matched: |<Wilma>|
$1 contains 'Wilma'
No match: |Alfred|
Matched: |<Wilma>|
$1 contains 'Wilma'
No match: |fred flintstone|
Matched: |<Wilma>|
$1 contains 'Wilma'
No match: |Wilmaerick|
Matched: |<AlWilma>|
$1 contains 'AlWilma'
Matched: |<Wilma> flintstone|
$1 contains 'Wilma'
No match: |Mr. Slate     |
No match: |Mississippi|
No match: |Bamm-Bamm    |
Matched: |<wilama>|
$1 contains 'wilama'
No match: |barney|
Matched: |<Fred and Wilma>|
$1 contains 'Fred and Wilma'
Matched: |<Wilma> and Fred|
$1 contains 'Wilma'
Matched: |<Fred and Wilma>      |
$1 contains 'Fred and Wilma'
Matched: |<Wilma> and Fred|
$1 contains 'Wilma'
Matched: |<Fred&Wilma>|
$1 contains 'Fred&Wilma'
No match: |Mrs. Fred Flintstone   |
No match: |I saw Fred yesterday|
No match: |I, Fred!|
No match: |Z|
Matched: |<llama>|
$1 contains 'llama'
No match: |fred|
$