How to split a string in Rust with multiple parameters?

Question

I am trying to split a string in Rust using both whitespace and ,. I tried doing

let v: Vec<&str> = "Mary had a little lamb".split_whitespace().collect(); let c: Vec<&str> = v.split(',').collect();

The result:

error[E0277]: the trait bound `for<'r> char: std::ops::FnMut<(&'r &str,)>` is not satisfied --> src/main.rs:3:26 | 3 | let c: Vec<&str> = v.split(',').collect(); | ^^^^^ the trait `for<'r> std::ops::FnMut<(&'r &str,)>` is not implemented for `char` error[E0599]: no method named `collect` found for type `std::slice::Split<'_, &str, char>` in the current scope --> src/main.rs:3:37 | 3 | let c: Vec<&str> = v.split(',').collect(); | ^^^^^^^ | = note: the method `collect` exists but the following trait bounds were not satisfied: `std::slice::Split<'_, &str, char> : std::iter::Iterator` `&mut std::slice::Split<'_, &str, char> : std::iter::Iterator`

Possible duplicate of How to split a string in Rust?

Stargateur
– Stargateur

2018-04-30 07:58:12 +00:00
Commented Apr 30, 2018 at 7:58 — Stargateur
– Stargateur, Commented Apr 30, 2018 at 7:58

Shepmaster · Accepted Answer · 2018-04-30 16:39:02Z

11

Use a closure:

let v: Vec<&str> = "Mary had a little lamb." .split(|c| c == ',' || c == ' ') .collect();

This is based upon the String documentation.

edited Apr 30, 2018 at 16:39

Shepmaster

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answered Apr 30, 2018 at 4:21

Ben Stern

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Comments

Boiethios · Accepted Answer · 2018-04-30 10:21:05Z

Pass a slice with the chars to it:

fn main() { let s = "1,2 3"; let v: Vec<_> = s.split([' ', ','].as_ref()).collect(); assert_eq!(v, ["1", "2", "3"]); }

split takes an argument of type Pattern. To see what concretely you can pass as parameter, see the implementors

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