post bits of code you like

i shall start:

open(F,"find -type f|");
while (<F>) {
 $_ = substr($_,2,-1);
 print "$_\n" if $v;
 push @{$dups{substr(`md5sum -b "$_"`,0,31)}}, $_;
}
close(F);

for every file in a directory it checksums the file, then adds the checksum as a key to a hash, the value being an array reference. the filename is then added to the array.

so basically the arrays have a list of files with the same checksum. i use this to find duplicates files.

>>18

This is the most you can ever get of 4 lines of code. Everybody should do that. In fact, I /r/ that everybody does this immediately.

If your site uses PHP, here's the equivalent code:

if (strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') !== FALSE) {
    header('Location: http://www.mozilla.org/products/firefox/';);
    exit(0);
}