Shame on you all! Shame!
If you are going to tell some one to buy a book, by all means you should point them to the Perl Monks Gift Shoppe. Our new friend Malkavian would then be able to order the excellent Mastering Regular Expressions (J. Freidl, O'Reilly Press) and support the Monastery at the same time.

And yes, Malkavian, you should get yourself a copy of that text. Not only will it help you with Perl regex's, but with the very concepts on which they are founded.