I answered that Groovy uses Java’s regular expression support and adds a few nifty features of its own to make regular expressions easier to apply.

The String.split methods can be very convenient for easily splitting a provided String based on a provided regular expression String . The only trick is figuring out a regular expression token to ...

One can achieve the same result using one or two lines of regular expression replacement, but the retort was that regular expressions, or regex, are notoriously slow. That's generally true.