Here is a quick example using glob, map, and sort to produce a list of files and their modified times. It's not quite a Swartzian transform, because we leave the modified time hanging around for the output.

#!/usr/bin/perl
use strict;
use warnings;
use CGI qw(:standard);

my %cache = ();
my @files =
    sort { $b->[1] <=> $a->[1] }
    map { [ $_, (stat($_))[9] ] }
    glob('pending/*');

print header;
print "<table>\n";
for my $file (@files) {
    print "<tr><td>$file->[0]</td><td>"
        . localtime( $file->[1] )
        . "</td></tr>\n";
}
print "</table>\n";
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also in the future, put <code></code> around code you post :)