2026-09-22 04:20 UTC
Replies (1)
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@thalia@discuss.systems 2026-09-22 04:32
When I read UNIX-HATERS a few years ago, it unexpectedly helped me fill a gap in regular expression history. In its chapter on Usenet, they complain about Larry Wall's rn newsreader. It introduced killfiles, which filter emails using regular expressions. Well, I had incidentally just been researching historical regular expression engines and trying to trace back the development of regular expressions in Perl 1.0. Since Larry Wall created both, it seemed likely that rn influenced Perl. It turned out that Perl adapted the engine from rn and ultimately from James Gosling's Emacs. Since Perl removed attribution comments, I don't think this had been established before. When I revisit that project, I'll need to update it for what I learned from James Gosling at SIGGRAPH. https://github.com/thaliaarchi/regexp-museum/blob/main/viewers/rn.md #unix #vintagecomputing #retrocomputing