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Diffstat (limited to 'src/tools/clippy/src/docs/iter_nth.txt')
-rw-r--r-- | src/tools/clippy/src/docs/iter_nth.txt | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/src/tools/clippy/src/docs/iter_nth.txt b/src/tools/clippy/src/docs/iter_nth.txt new file mode 100644 index 000000000..3d67d583f --- /dev/null +++ b/src/tools/clippy/src/docs/iter_nth.txt @@ -0,0 +1,20 @@ +### What it does +Checks for use of `.iter().nth()` (and the related +`.iter_mut().nth()`) on standard library types with *O*(1) element access. + +### Why is this bad? +`.get()` and `.get_mut()` are more efficient and more +readable. + +### Example +``` +let some_vec = vec![0, 1, 2, 3]; +let bad_vec = some_vec.iter().nth(3); +let bad_slice = &some_vec[..].iter().nth(3); +``` +The correct use would be: +``` +let some_vec = vec![0, 1, 2, 3]; +let bad_vec = some_vec.get(3); +let bad_slice = &some_vec[..].get(3); +```
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