Learn Regex The Hard Way
This being zedshaw, no surprise at the lack of Perl in this book,  but what is funny is at <a href="http://regex.learncodethehardway.org/book/learn-regex-the-hard-wayli3.html#x4-50000.2" rel="nofollow">http://regex.learncodethehardway.org/book/learn-regex-the-ha...</a> "Imagine if you could write your regular expressions like this: "  I don't have to imagine since Perl's regular expression engine has the x modifier to do just that.