Great suggestion.

On my list of future Bash topics I have Regular Expressions, quite near the top. That episode would include BASH_REMATCH of course.

I have mentioned one or two of the other Bash variables in passing such as FUNCNAME , but there are many more.

Thanks for the feedback.

By the way, with our new comment system we strip HTML but take measures to try to ensure all other ASCII characters pass through unhindered. So dollar signs ($) shouldn't be a problem.