regex - 如何获得模式的第一个匹配项？

Question

如何从下面的字符串中获取 c999752_ABC_PAT？

$file = q(M:\c999752_ABC_PAT\Informatica_AVOB\ABC_infa\dummy\TestDeliver.txt);

Answer 1

你可以使用这个正则表达式

^.*?\\(.*?)\\.*$
|   |   |     |->matches till the end
|   |   |->your content matched till the first occurance of \
|   |->match lazily till the first \
|->start of the text

Group1捕获您的数据

Answer 2

Or use what Eammon suggested:

my $firstPart = ( split /\\/, $file )[1];

Answer 3

use File::Spec::Win32;

my $file = q(M:\c999752_ABC_PAT\Informatica_AVOB\ABC_infa\dummy\TestDeliver.txt);
my ($volume, $directories) = File::Spec::Win32->splitpath($file);
my @directories = File::Spec::Win32->splitdir($directories);

print $directories[1], "\n";