You know you've reached the upper echelons of nerd-dom when you find yourself excitedly discussing regular expressions, or regex, to a friend. "Dude, you shoulda seen this regex I constructed! It was totally cool!" Hoo boy. Been there, done that, wearing the beanie to prove it. This web site - RegularExpressions.info - is really good at the information part of a web site, since there's a ton of great stuff there about regex, with examples, tutorials, tools, and more. Much of it is from a Windows perspective, but it's still useful to Penguinheads like me. However, the navigation on this site is ... eccentric, shall we say. No, it just sucks. That's too bad. Deal with the crappy nav, and get the good info. And learn how to use regex!

(Check out all of our posts on regular expressions.)