The whole program is a bit complex and does a bunch of stuff that isn't relavent to this issue, but I've cut out everything but this section that shows the problem I'm having. 
#!/usr/bin/perl -w

use strict;

my @h = ( qw(
                psapp1
                psapp
                psapp2
                psepapp1
                psepapp
                psepapp2
                psimgprod
                pspappuat
                pswebapp2
                pswebapp
              ) );

my @h_sorted = @h[
        map { unpack "N", substr($_,-4) }
        sort
        map {
            my $key = $h[$_];
            $key =~ s[(\d+)][ pack "N", $1 ]ge;
            $key . pack "N", $_
        } 0..$#h
];
    

foreach (@h_sorted) { print "$_\n"; };

[download]

When I run this program, with my Perl (This is perl, v5.8.6 built for darwin-thread-multi-2level), I get: 
psapp
psapp1
psapp2
psepapp1
psepapp2
psepapp
psimgprod
pspappuat
pswebapp2
pswebapp

[download]
The "psapp" items sort properly, but the "psepapp" and "pswebapp" ones show the problem I'm asking about. Thanks! -s-

In reply to Re^3: [ Natural Sort ]: Sorting a string with numbers by blueflashlight
in thread [ Natural Sort ]: Sorting a string with numbers by zzspectrez

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