A couple of weeks ago rray posted this tip about If nodes, where instead of iterating over an array, he plugs an array into the If node.

This particular example (if array element < 12, set it to the array minimum) could be done without using either a Repeat or an If (although the If is more elegant). If you've got a minute or two, work your way through it; if not, click through the link below to see how.