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submitted 4 days ago* (last edited 4 days ago) by NateNate60@lemmy.world to c/programmerhumor@lemmy.ml

^.?$|^(..+?)\1+$

Matches strings of any character repeated a non-prime number of times

https://www.youtube.com/watch?v=5vbk0TwkokM

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[-] fubo@lemmy.world 18 points 4 days ago* (last edited 4 days ago)

Whatever you do, don't get in a time machine back to 1998 and become a Unix sysadmin.

(Though we didn't have CL-PPCRE then. It's really the best thing that ever happened to regex.)

[-] ikidd@lemmy.world 2 points 3 days ago

I was a sysadmin with some Linux usage in 1998, does that count?

[-] Treczoks@lemmy.world 4 points 4 days ago

I have to admit that using CL-PPCRE does not really help me understanding the regexp any better. But this may be because I deal with complex regexps for decades now, and I just read them.

this post was submitted on 31 Oct 2024
333 points (98.0% liked)

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