snaggen to Rust · 9 months agoAnnouncing Rust 1.76.0blog.rust-lang.orgexternal-linkmessage-square23fedilinkarrow-up1104arrow-down10
arrow-up1104arrow-down1external-linkAnnouncing Rust 1.76.0blog.rust-lang.orgsnaggen to Rust · 9 months agomessage-square23fedilink
minus-squareλλλlinkfedilinkarrow-up7·edit-29 months agoDo you mind explaining? Maybe with the context of another languages equivalent?
minus-squareanlumo@feddit.delinkfedilinkEnglisharrow-up15arrow-down2·9 months agolet bar: Result<T, E> = ...; let foo = bar.inspect(|value| log::debug("{}", value)); is equivalent to let bar: Result<T, E> = ...; let foo = bar.map(|value| { log::debug("{}", value); value });
minus-squarexavlinkfedilinkarrow-up1·9 months agoWarning: in the first case “value” is actually a shared reference, not a value.
minus-squareGissaMittJobb@lemmy.mllinkfedilinkarrow-up2·9 months agoLooks vaguely like Stream::peek from Java, I think? There’s an equivalent method in Iterator::inspect.
minus-squareowseilinkfedilinkarrow-up1·edit-29 months agoit’s just a way to use map with a reference instead of the value, by what I understood. could be usefull for logging values in a Result so you can see it. However I think you can already do that by just mapping and returning the variable.
Do you mind explaining? Maybe with the context of another languages equivalent?
is equivalent to
Warning: in the first case “value” is actually a shared reference, not a value.
Elegant. Thanks!
Looks vaguely like
Stream::peekfrom Java, I think? There’s an equivalent method inIterator::inspect.it’s just a way to use map with a reference instead of the value, by what I understood.
could be usefull for logging values in a Result so you can see it. However I think you can already do that by just mapping and returning the variable.