title: Matching an empty string with regex
body: <p>I've seen posts here on stackoverflow that say that the regex <code>^$</code> will match an empty string... So it made me think... why not something like this: <code>^\s+$</code> - does that not also work?  I know it's more typing, but it in my mind, it also makes more sense.  I've not used a whole lot of regex before, but it seems like my need for them is becoming greater as the days go by - so I'm taking the hint and attempting to learn. </p>