Tyler Mandry 17ec4b8258 Rollup merge of #79809 - Eric-Arellano:split-once, r=matklad ... Dogfood `str_split_once()` Part of https://github.com/rust-lang/rust/issues/74773. Beyond increased clarity, this fixes some instances of a common confusion with how `splitn(2)` behaves: the first element will always be `Some()`, regardless of the delimiter, and even if the value is empty. Given this code: ```rust fn main() { let val = "..."; let mut iter = val.splitn(2, '='); println!("Input: {:?}, first: {:?}, second: {:?}", val, iter.next(), iter.next()); } ``` We get: ``` Input: "no_delimiter", first: Some("no_delimiter"), second: None Input: "k=v", first: Some("k"), second: Some("v") Input: "=", first: Some(""), second: Some("") ``` Using `str_split_once()` makes more clear what happens when the delimiter is not found.		2020-12-10 21:33:08 -08:00
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src	Rollup merge of #79809 - Eric-Arellano:split-once, r=matklad	2020-12-10 21:33:08 -08:00
Cargo.toml	Added some unit tests as requested	2020-11-11 16:40:17 -08:00