A short list of free Perl books.
https://www.ossblog.org/grasp-perl-open-source-books/
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Be careful, it isn't actually a regex; it is a string that will be compiled
to a regex. You can see one difference here:
#!/usr/bin/perl
use v5.20;
use warnings;
say "string matches:";
for my $s ("foo", "AfooZ") {
say "\t$s: ", $s =~ "\Afoo\Z" ? "true" : "false";
}
say "regex matches:";
for my
