Re: regex with arrays and variables

[Random_Walk]

If you have a lot of regex to use, and want to know which one matched, you can speed things up by pre-compiling them.

#!/usr/bin/perl
use strict; use warnings;
use Data::Dumper;

my @array = ("foo {abc123}\n", "bar {def456}\n", "baz {ghi789}\n");
my @patterns = ("foo", "bar", "quux");

# pre compile regex
my %regex;
for (@patterns) {
   $regex{$_}=qr/$_/;
}

for my $i (@array) {
   print "checking $i"; # was chomping then adding a \n"

   for (keys %regex) {
      if ($i =~ $regex{$_}) {
         print "$i is in patterns (matches $_) - skipping\n";
         last;
      }
   }
   print "$i IS NOT IN PATTERNS\n";
   # Do something with $i now.
}

Cheers,
R.