[TUHS] Regular Expressions

Noel Chiappa jnc at mercury.lcs.mit.edu
Sat Aug 1 10:00:23 AEST 2020

    > From: Will Senn

    > I don't really understand how they work.
    > ...
    > maybe the way to understand the unix regex lies in a careful
    > investigation into how it is implemented

I'm not sure what I did, but it wasn't the latter, since I have no idea how
they are done!

I just mentally break the regex search string up into substrings (I use them
most in Epsilon, which has syntax to do substrings of search strings, which
helps a lot); past that, I think it's just using them and getting used to

    > an IBM 7094 (whatever that is)

IBM's last 36-bit scientific mainframe before the System/360's. CTSS (which
DMR held out as the ancestor of Unix) ran on 7094's.


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