qaz@lemmy.world to Programmer Humor@programming.devEnglish · edit-21 day agoSlapping on a .expect is also error handling!lemmy.worldimagemessage-square26fedilinkarrow-up1161arrow-down15file-text
arrow-up1156arrow-down1imageSlapping on a .expect is also error handling!lemmy.worldqaz@lemmy.world to Programmer Humor@programming.devEnglish · edit-21 day agomessage-square26fedilinkfile-text
minus-squareKorne127@lemmy.worldlinkfedilinkarrow-up15·2 days agoI mean using unwrap is not bad practice if the value is guaranteed to not be none, which can happen frequently in some applications.
minus-squaremobotsar@sh.itjust.workslinkfedilinkEnglisharrow-up4·edit-21 day agoIf it’s guaranteed to not be None, why is it an Option?
minus-squareemilgardis@lemmy.mllinkfedilinkEnglisharrow-up3·1 day agoHere’s a bad example but hopefully captures the why. https://play.rust-lang.org/?version=stable&mode=debug&edition=2024&gist=43d055381e7bb52569c339d4526818f4 We have a condition we know must be satisfied (the option will always be Some), but cant prove in code.
minus-squaremarcos@lemmy.worldlinkfedilinkarrow-up2·edit-21 day agoOh, it can happen when you do calculations with compile-time constants… But the GP’s claim that it’s a “frequent” thing is suspect. (Crashing is also useful when you are writing and-user applications, but you’ll probably want .expect like in the meme.)
minus-squareqaz@lemmy.worldOPlinkfedilinkEnglisharrow-up10arrow-down1·edit-21 day agoA good example would be regex. After validating it when writing the program it should always compile, although this could also be solved with a proc macro that validates the regex at compile time.
I mean using unwrap is not bad practice if the value is guaranteed to not be none, which can happen frequently in some applications.
If it’s guaranteed to not be
None, why is it anOption?Here’s a bad example but hopefully captures the why. https://play.rust-lang.org/?version=stable&mode=debug&edition=2024&gist=43d055381e7bb52569c339d4526818f4
We have a condition we know must be satisfied (the option will always be Some), but cant prove in code.
Oh, it can happen when you do calculations with compile-time constants…
But the GP’s claim that it’s a “frequent” thing is suspect.
(Crashing is also useful when you are writing and-user applications, but you’ll probably want .expect like in the meme.)
A good example would be regex. After validating it when writing the program it should always compile, although this could also be solved with a proc macro that validates the regex at compile time.