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### What it does
Checks for the use of `.iter().count()`.
### Why is this bad?
`.len()` is more efficient and more
readable.
### Example
```
let some_vec = vec![0, 1, 2, 3];
some_vec.iter().count();
&some_vec[..].iter().count();
```
Use instead:
```
let some_vec = vec![0, 1, 2, 3];
some_vec.len();
&some_vec[..].len();
```
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