What is the
($files >= 1) bit for? You're putting a string (the filename) into a numeric context here? Are your filenames numeric or are you trying to test to see if
$files is non-empty? If it's the latter, consider just doing
if ($files) { ... }, but realize that your
while statement above that would have done that test itself, or else you wouldn't be inside the loop! The plural itself is kind of a misnomer as well, but it's not hurting anything.
In addition, expanding upon your 'while' test, if you have a filename of 0 (zero), your loop will exit, even if there are more files to be read. Consider checking for defined-ness: while (defined ($file = readdir(DIR))) { ... }
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