slice: tweak concat & join #56463
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slice: tweak concat & join #56463
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@bors r+ rollup |
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📌 Commit ae53273 has been approved by |
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Dec 9, 2018
slice: tweak concat & join
- use `sum` instead of `fold` (readability)
- adjust the capacity for `join` - the number of separators is `n - 1`, not `n`; proof:
```
fn main() {
let a = [[1, 2], [4, 5]];
let v = a.join(&3);
assert_ne!(v.len(), v.capacity()); // len is 5, capacity is 6
}
```
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@bors ping |
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💔 Test failed - status-travis |
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The job Click to expand the log.I'm a bot! I can only do what humans tell me to, so if this was not helpful or you have suggestions for improvements, please ping or otherwise contact |
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The error seems spurious. |
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@bors retry |
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Dec 9, 2018
slice: tweak concat & join
- use `sum` instead of `fold` (readability)
- adjust the capacity for `join` - the number of separators is `n - 1`, not `n`; proof:
```
fn main() {
let a = [[1, 2], [4, 5]];
let v = a.join(&3);
assert_ne!(v.len(), v.capacity()); // len is 5, capacity is 6
}
```
|
☀️ Test successful - status-appveyor, status-travis |
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suminstead offold(readability)join- the number of separators isn - 1, notn; proof: