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Brain Teaser

PHP solution to this brain teaser – it only took a few minutes.

In:

$array = array('a', 'b', 'c', 'c', 'd','e', 'e',
            'e', 'e', 'e', 'f', 'e', 'f', 'e',
            'f', 'a', 'a', 'a', 'f', 'f', 'f');

Out:

abccdee<span>eee</span>fefefaa<span>a</span>ff<span>f</span>
            

My Solution:

$curr = '';
            $count = 0;
            foreach($array AS $letter) {
                if($curr != $letter) {
                    if($count > 2) // more than two dupes
                        print '</span>';
                    $count = 0;
                    $curr = $letter;
                }
                if($count == 2) print '<span>';
                $count++;
                print $letter . ' ';
            }