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regexperlchomp

Grab values between delimiters in Perl from chomped line

I am trying to grab the values between two delimiters in Perl using regex. I am opening a file and using chomp to go through the file line by line. Example of how the file looks:

"This is <tag> an </tag> example
of the <tag> file </tag> that I
am <tag> trying </tag> to <tag> parse </tag>"

I am able to get the first couple of words: "an", "file", but on the third line I can only get "trying" and not "parse". This is the code I am trying to use:

while (chomp($line = <$filename>)){
   ($tag) = $line =~ m/<tag>(.*?)<\/tag>/;
   push(@tagarray, $tag);
}

I suspect this has something to do with chomp but don't see how to parse the file differently.

Solution

  • I suspect this has something to do with chomp

    No. It is because you are capturing only one value and assigning it to a scalar.

    Make the regex global (/g) and store the results in an array.

    #!/usr/bin/env perl

use strict;
use warnings;
use v5.10;

my $line = "am <tag> trying </tag> to <tag> parse </tag>";
my @tags;
(@tags) = $line =~ m/<tag>(.*?)<\/tag>/g;
say join ",", @tags;