I recently gave a talk for a group of university students studying web development in Belgrade, Serbia. In it, I talked about my background, my experience starting in tech and eventually working at Facebook for seven years, and (most relevant to this blog) I spent about 20 minutes showing off some cool and advanced regular expressions. Specifically, regexes for switching Fahrenheit to Celsius, deleting repeated words, deleting non-adjacent duplicate lines, checking password complexity, reformatting names, adding thousands separators, matching balanced parentheses, and matching palindromes.
You can find the video and slides here (Lecture at SAE Belgrade: Lessons from Facebook) or you can watch the video on YouTube (with the regex portion starting at 52:26).