用管道替换逗号，而不是用双引号括起的逗号 [英] Replace commas with pipes, but not the commas enclosed in double quotes

问题描述

我有一个像这样的记录集

I have a record set that looks like this

"BOSW0001","Mr","Wayne","Boswell","Wayne,Jessica & Lyn","31 Baker St"
"ELLI0007","Mrs","Bronwyn","Elliott","Bronwyn, Paul & Arianne","98A Dandaraga Rd"
"KENN0001","Mr","Leigh","Kenning","Leigh & Beth,Cole","22 Lake St"

我想用管道（， > | ），而不替换

I want to replace the comma (,) with pipe (|) without replacing the comma inside of

"Leigh & Bethie,Coles"
"Waynez,Jessy & Lyne"
"Bronwynie, Paula & Arianne"

如何使用正则表达式或其他方法？

How can I do this using regular expression or other methods?

推荐答案

它与正则表达式;你使用一个合适的CSV解析器。这是一个（未测试的）示例，使用 Text :: CSV_XS - 在biz中最好的。

You don't do it with a regular expression; you do it with a proper CSV parser. Here's an (untested) example using Text::CSV_XS - the best in the biz.

use strict;
use warnings;

use Text::CSV_XS;

my $in_file = "whatever.csv";
my $out_file = "new.dat";

open my $fh, '<', $in_file or die "$in_file: $!";
open my $out_fh, '>', $out_file or die "$out_file: $!";

my $in_csv = Text::CSV_XS->new;
my $out_csv = Text::CSV_XS->new( { sep_char => '|', eol => "\n" } );

while( my $row = $in_csv->getline( $fh ) ) { 
    $out_csv->print( $out_fh, $row );
}

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