NateNate60@lemmy.world to Programmer Humor@lemmy.ml · edit-210か月前Oh boy what a beautiful regex. I'm sure it does something logical and easy to understand.lemmy.worldimagemessage-square81fedilinkarrow-up1345file-text
arrow-up1345imageOh boy what a beautiful regex. I'm sure it does something logical and easy to understand.lemmy.worldNateNate60@lemmy.world to Programmer Humor@lemmy.ml · edit-210か月前message-square81fedilinkfile-text
^.?$|^(..+?)\1+$ <answer> Matches strings of any character repeated a non-prime number of times https://www.youtube.com/watch?v=5vbk0TwkokM
minus-squareRegalPotoo@lemmy.worldlinkfedilinkEnglisharrow-up10·edit-210か月前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”!<
minus-squarenaonintendois@programming.devlinkfedilinkarrow-up8·10か月前You’re misreading the ..+? part. That means 2 or more characters, non greedy.
minus-squareNateNate60@lemmy.worldOPlinkfedilinkarrow-up4·10か月前It’s a line with a sequence of two or more characters repeated at least twice.
minus-squareMummifiedClient5000@feddit.dklinkfedilinkEnglisharrow-up4·10か月前Only the part after the pipe character. The pipe character works as an “or” operator. RegalPotoo is right.
minus-squareNateNate60@lemmy.worldOPlinkfedilinkarrow-up4·10か月前They said— 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 Note— …or a line with a sequence of 1 or 3 or more characters, repeated at least twice It should be— …or a line with a sequence of 2 or more characters, repeated at least twice The regex in the post will match “abab”. Their original description (line 2 of this comment) will not match “abab”.
minus-squareMummifiedClient5000@feddit.dklinkfedilinkarrow-up4·10か月前I agree, you’re right about the part after the pipe and RegalPotoo’s explanation was not entirely correct.
Something like
You’re misreading the
..+?part. That means 2 or more characters, non greedy.It’s a line with a sequence of two or more characters repeated at least twice.
Only the part after the pipe character. The pipe character works as an “or” operator. RegalPotoo is right.
They said—
Note—
It should be—
The regex in the post will match “abab”. Their original description (line 2 of this comment) will not match “abab”.
I agree, you’re right about the part after the pipe and RegalPotoo’s explanation was not entirely correct.