Introduction - If you have any usage issues, please Google them yourself
This tutorial is aimed at programmers who work
with tools that use regular expressions, and who
would like to become more comfortable with the
intricacies of regular expressions. Even
programmers who have used regular expressions
in the past, but have forgotten some of the details,
can benefit from this tutorial as a refresher.
After completing this tutorial, you will not yet be an
expert in using regular expressions to best
advantage.