Regex 101.

Regex 101.  Longtime readers know that I'm a big fan of regular expressions (“regex” for short) for text processing.  I use them a lot in my programming, sometimes to my former colleagues' chagrin :)  There are a lot of web sites designed to help people create and debug regular expressions.  I just ran across one that's new to me: Regex101.  It's better than anything I've seen yet, though, sadly, it doesn't support my favorite regex flavor: Java.