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submitted 8 months ago* (last edited 8 months ago) by NateNate60@lemmy.world to c/programmerhumor@lemmy.ml

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

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

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[-] RegalPotoo@lemmy.world 25 points 8 months ago

Syntactically valid Perl

[-] RegalPotoo@lemmy.world 10 points 8 months ago* (last edited 8 months ago)

Something like

!"A line with exactly 0 or 1 characters, or a line with a sequence of 1 or 3 or more characters, repeated at least twice"!<

[-] naonintendois@programming.dev 8 points 8 months ago

You're misreading the ..+? part. That means 2 or more characters, non greedy.

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this post was submitted on 31 Oct 2024

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