Nice, too few people realise that you can just return a string to evaluate as zero, but still be true. I often return things like "0 but true" when I want the 0 value to be true; that way you can return 0 on errors too. A little trick I picked up was if you need to print the value, you can just use "0\0" It's 0 plus the null character, so it's true, but it only prints 0.

The 15 year old, freshman programmer,
Stephen Rawls