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From: Larry McVoy <lm@mcvoy.com>
To: Marc Rochkind <mrochkind@gmail.com>
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Subject: [TUHS] Re: regex early discussions
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On Sun, Mar 03, 2024 at 07:38:45PM -0800, Larry McVoy wrote:
> Marc is right.  I'll add that I grew up in terminal rooms, a bunch of
> kids connected to a VAX 780, like 40 or more.  I have no idea how the
> kids ahead of me learned but I learned by looking at their terminal
> and going "what did you just do?".
> 
> My real understanding of regex is from Henry Spencer's regex.

And this little implementation, I've used this one a lot.   

http://www.cs.yorku.ca/~oz/regex.bun