@RegExTip’s Favourites

By now, I suspect most readers are familiar with the most incredibly large instant-messaging chat-room on the planet: twitter.com

From that resource, I discovered several users who tend to share snippets of useful coding knowledge. One such user goes by the identiy, @regextip . Please, take a moment to review his profile page at Twitter™ , whereby the reader may learn more of that author’s benevolent contributions to the coding community, moreover, the public community in general. I believe he is quite the gifted, and saintly individual.

Moving on from @regextip himself, what follows are those bits he’s shared which I find most useful:

Positive look-behind [2012-05-08]

Positive look-behind is denoted (?<= ... ). Example: (?<=L)(\d{3}) captures a group of three digits if they are proceeded by 'L'