Obviously TIMTOWTDT, but I think that method would be overly confusing - being concise is a good thing, but IMHO it is far better to use a few more characters and clearly state your intentions. The first method is clearly a conditional; the second is confusing at best.

Oh, and you forgot the comma in your ('did', 'did not') list :) What do you think this is, lisp? :P

Update:Argh, agoth beat me on this one... need to be quicker on the draw and not get distracted while I'm trying to post {grin}
buzzcutbuddha: my sentiments exactly :)