Raise your hand if you know how to validate an email address. For those of you with your hand in the air, put it down quickly before someone sees you. It’s an odd sight to see someone sitting alone at the keyboard raising his or her hand. I was speaking metaphorically. Before yesterday I would have raised my hand (metaphorically) as well. I needed to validate an email address on the server. Something I’ve done a hundred thousand times (seriously, I counted) using a handy dandy regular expression in my personal library. This time, for some reason, I decided to...