in my script I readdir and load all of the sub directory names into an array @topics

I am wondering how I can sort those so when i print them

foreach $f (@topics){
print <<html;
<a href="$f">$f</a><br>
html
}
[download]

They are printed out by creation date, newest listed first.

Any special tricks to it? update: right now they are in order, just in reverse. What i need it a way to reverse the order of the array contents. Thanks all!