> When working with Boolean expressions in this way, deMorgan's laws often come in handy; these state that: > > !a AND !b is the same as !(a OR b) > !a OR !b is the same as !(a AND b) > > Hope this helps!!
I don't know who this deMorgan dude is, but that rule is being written down in red on a piece of paper that's getting stuck to the bottom of my screen. It makes perfect sense, and I can start to see where the whole "maths" thing comes into programming now... It's actually not only a case of logic, but very much based on maths as well (which I'm afraid isn't something I'm good at)... Needless to say, this helped me quite a bit... I'll try and implement it wisely :-) -- me -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php