I have a working script that I need to update to cross reference another file, I'm clearly in the wrong headspace because I don't see my error.

First my working code is below, I'm basically opening 2 files for reading and 1 file for output, the $keywords file is opened and compared to the $search_file, if the line from the $keywords file is found in the $search_file I print that line from the $search_file into the $wave file. Pretty basic, their also a regex comparison to ignore certain lines I don't need. This works, runs in a second or two.

<new requirement>I now need to open yet another file, lets open it as $schedule. I need to see if the line I found in the $search_file is also in the $schedule file, if so, I want to print "yes" on the same line that I was printing into the $wave file while its on that step in the iteration. It seems pretty straight forward, but I've tried a few different ways to no avail, It ends up in a very long running loop that I eventually cancel, it's clearly not what I'm trying to do.

Does this make sense? I generally try to avoid nesting loops very deep and I'm clearly getting something wrong. Again the code below works for my previous need, I just want to add to it to add the <new requirement> 
#!usr/bin/perl
use warnings;

open my $wave,    '>', 'Wave' or die "Can't open $wave: $!";
open my $keywords,    '<', 'Agents' or die "Can't open keywords: $!";
open my $search_file, '<', 'Definitions'   or die "Can't open search f
+ile: $!";

my $keyword_or = join '|', map {chomp;qr/\Q$_\E/} <$keywords>;
my $regex = qr|\b($keyword_or)\b|;

while (<$search_file>)
{
    while (/$regex/g)
    {
        $line = $_;
        if ( $line =~ /(SCRIPTNAME|DESCRIPTION)/ ) {
        next; 
        }
        print $wave $line;

    }
}
$_->close for $wave, $keywords, $search_file;

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I'll keep working on it but I appreciate any insight you can provide

In reply to nesting loops help? by shadowfox

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