NateNate60@lemmy.world to Programmer Humor@lemmy.ml · edit-22 years agoOh boy what a beautiful regex. I'm sure it does something logical and easy to understand.lemmy.worldimagemessage-square81fedilinkarrow-up1345arrow-down18file-text
arrow-up1337arrow-down1imageOh 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-22 years agomessage-square81fedilinkfile-text
^.?$|^(..+?)\1+$ <answer> Matches strings of any character repeated a non-prime number of times https://www.youtube.com/watch?v=5vbk0TwkokM
minus-squareFeathercrown@lemmy.worldlinkfedilinkEnglisharrow-up3·2 years agoIs there a reason to use (..+?) instead of (.+) ?
minus-squareexplore_broaden@midwest.sociallinkfedilinkarrow-up5·2 years agoYes, the first one matches only 2 more characters while the second matches 1 or more. Also the +? is a lazy quantifier so it will consume as little as possible.
minus-squareFeathercrown@lemmy.worldlinkfedilinkEnglisharrow-up3·2 years agoAh, didn’t know +? was lazy, thanks
minus-squareEphera@lemmy.mllinkfedilinkarrow-up3·2 years agoI thought, the +? was going to be a syntax error. 🙃
minus-squareFeathercrown@lemmy.worldlinkfedilinkEnglisharrow-up3·2 years agoI was like, why specify “one or more” and then make it optional? Isn’t that just .*?
Is there a reason to use
(..+?)instead of(.+)?Yes, the first one matches only 2 more characters while the second matches 1 or more. Also the +? is a lazy quantifier so it will consume as little as possible.
Ah, didn’t know +? was lazy, thanks
I thought, the +? was going to be a syntax error. 🙃
I was like, why specify “one or more” and then make it optional? Isn’t that just .*?