What's the equivalent of Scala's getOrElse in Rust?

Question

In Scala, I can use getOrElse as a convenient way to get a default value from Option, what's the equivalent of this in Rust?

val threeOpt = Some(3)
val shouldBeThree = threeOpt.getOrElse(-1) // got 3

Please note that the standard structs are documented: https://doc.rust-lang.org/std/option/enum.Option.html — Denys Séguret, Nov 04 '19 at 13:16
Note to close voters: while the question shows no research effort, that is not grounds for closing. Downvote, instead, and move on, or merely ignore it. [Relevant Meta link.](https://meta.stackoverflow.com/questions/260828/do-we-need-a-close-reason-for-zero-effort-questions) — trent, Nov 04 '19 at 13:39
Good question! I think. @trentcl "while the question shows no research effort" — the linked rust-lang docs is a 500 - 1000 lines page, and then I think it makes sense to ask. Isn't one of the points with SO to avoid having to spend so much time reading "everything", and instead find answers quickly. Also, coming from a Scala background, "unwrap ..." is an unexpected name, and, personally, I was wondering if there's some "get ..." function I hadn't found. (I'm not OP, just another Scala & now Rust user.) — KajMagnus, Nov 07 '21 at 09:09
(B.t.w @trentcl agreed anyway that it's no grounds for closing, good point) — KajMagnus, Nov 07 '21 at 13:40

score 10 · Accepted Answer · edited Jun 19 '22 at 19:42

10

edited Jun 19 '22 at 19:42

ecoe

answered Nov 04 '19 at 13:03

Shankar Shastri

1 Answers1