The following chunk is intended to parse 2 logfiles for their diff, and write the results as a third file.   One origianl logfile contains combined STDOUT+STDERR and the other contains only STDERR.

But it doesn't do that at all.   8^(   Rather, the resulting (small-relative-to-either-original log) file contains an out-of-order hodgepodge from both originals.

What, praytell, am I doing wrong here?   davorg's Array::Compare doesn't look to do what I need.   I've looked at bikeNomad/Dominus' Alorithm::Diff, but don't make heads or tails of it. 

#!/usr/bin/perl -w

# rlog.pl


$|++;               # stdout hot
use strict;         # avoid d'oh! bugs
require 5;          # for following modules



my $logDir  = '/cygdrive/c/Rsync/logs';
my $allLog  = "$logDir/200203021258.all";
my $errLog  = "$logDir/200203021258.err";
my $fileLog = "$logDir/200203021258.fil";



# slurp two existing logs into arrays:
open ERRLOG, "$errLog" or die "Error opening $errLog: $!";
my @err = <ERRLOG>;
close ERRLOG;

open ALLLOG, "$allLog" or die "Error opening $allLog: $!";
my @all = <ALLLOG>;
close ALLLOG;



# create @file from diff of ERR and ALL:
my %count;
my @file;
$count{$_}++ for ( @all, @err );
for ( keys %count ) {
  push @file, $_ unless ( $count{$_} == 2 );
}



# write $fileLog from @file:
open FILELOG, "> $fileLog" or die "Error opening $fileLog: $!";
for (@file) {
  print FILELOG;
}
close FILELOG;

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    cheers,
    Don
    striving toward Perl Adept
    (it's pronounced "why-bick")

In reply to Save 2 files' diff as 3rd file by ybiC

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