Hey, Not sure if I understand the question ... but, this will give you the last modified file.

#!/usr/bin/perl

use Modern::Perl;
use IO::Dir;

my $path = shift;
my $dir = IO::Dir->new($path);
my %files;

for my $file (grep !/^\./, $dir->read) {
        $files{$file} = (stat("$path/$file"))[9];
}

my $file = (sort {$files{$a} <=> $files{$b}} keys %files)[0];
say "$file ", scalar localtime($files{$file});

undef $dir;
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