Implement .nth_back() for iterators #686
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The `.nth_back()` method was added to the `DoubleEndedIterator` trait in Rust 1.37. Providing an implementation for `Baseiter` and forwarding it for `Iter/Mut` improves performance.
| @@ -564,6 +564,65 @@ fn test_fold() { | |||
| assert_eq!(a.iter().fold(0, |acc, &x| acc + x), 1); | |||
| } | |||
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| #[test] | |||
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For the sake of readability, would it make sense to split these checks in multiple test cases?
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Yeah, I agree. I've split it up.
LukeMathWalker
approved these changes
Aug 21, 2019
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Merging 👍 |
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The
.nth_back()method was added to theDoubleEndedIteratortrait in Rust 1.37 (released today). Providing an implementation forBaseiterand forwarding it forIter/Mutimproves performance.