1 error: avoid using `collect()` when not needed
2 --> $DIR/needless_collect.rs:11:28
4 LL | let len = sample.iter().collect::<Vec<_>>().len();
5 | ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace with: `.count()`
7 = note: `-D clippy::needless-collect` implied by `-D warnings`
9 error: avoid using `collect()` when not needed
10 --> $DIR/needless_collect.rs:12:21
12 LL | if sample.iter().collect::<Vec<_>>().is_empty() {
13 | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace with: `.next().is_none()`
15 error: avoid using `collect()` when not needed
16 --> $DIR/needless_collect.rs:15:27
18 LL | sample.iter().cloned().collect::<Vec<_>>().contains(&1);
19 | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace with: `.any(|x| x == 1)`
21 error: avoid using `collect()` when not needed
22 --> $DIR/needless_collect.rs:16:34
24 LL | sample.iter().map(|x| (x, x)).collect::<HashMap<_, _>>().len();
25 | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace with: `.count()`
27 error: aborting due to 4 previous errors