note 67274 added to function.shuffle

I spoke too soon. Other readers spotted than Benton's code was a little wrong. What a mess this thread is. This stuff isn't PHP, but I believe it correctly implements Fisher-Yates. random(a, b) returns a number n such that a <= n <= b. The arrays start at 0. Hopefully this is enough to help someone who's trying to implement FY (in whatever language). i = data_length; if (i == 0) return; while (i--) { r = random(0, i); tmp = data[i]; data[i] = data[r]; data[r] = tmp; } ---- Server IP: 64.71.164.2 Probable Submitter: 130.184.185.105 ---- X-Spam-Status: No, hits=3.1 required=5.0 tests=DATE_MISSING,FROM_NO_LOWER autolearn=no version=2.64 ---- Manual Page -- http://www.php.net/manual/en/function.shuffle.php Edit -- http://master.php.net/note/edit/67274 Del: integrated -- http://master.php.net/note/delete/67274/integrated Del: useless -- http://master.php.net/note/delete/67274/useless Del: bad code -- http://master.php.net/note/delete/67274/bad+code Del: spam -- http://master.php.net/note/delete/67274/spam Del: non-english -- http://master.php.net/note/delete/67274/non-english Del: in docs -- http://master.php.net/note/delete/67274/in+docs Del: other reasons-- http://master.php.net/note/delete/67274 Reject -- http://master.php.net/note/reject/67274 Search -- http://master.php.net/manage/user-notes.php