extend needless_collect

[lengyijun]

What it does

Inspired by fish-shell/fish-shell#11214

Advantage

Better performance

Drawbacks

None

Example

let v : Vec<usize> = vec![1, 2,3];
    let iter = v.into_iter();
    let _ = iter.collect::<Vec<_>>()[1];

Could be written as:

let v : Vec<usize> = vec![1, 2,3];
    let iter = v.into_iter();
    let _ = iter.nth(1).unwrap()

[shionryuu]

Maybe you should fix the suggestion for the following code

    pub fn convert_date_to_binary(date: String) -> String {
        let [y, m, d] = date
            .split('-')
            .map(|s| s.parse::<u32>().unwrap())
            .collect::<Vec<_>>()[..]
        else {
            unreachable!()
        };
        format!("{y:b}-{m:b}-{d:b}")
    }

error: avoid using `collect()` when not needed
  --> src/convert_date_to_binary.rs:76:14
   |
76 |             .collect::<Vec<_>>()[..]
   |              ^^^^^^^^^^^^^^^^^^^^^^^ help: replace with: `nth(..).unwrap()`
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_collect
    = note: `-D clippy::needless-collect` implied by `-D warnings`
    = help: to override `-D warnings` add `#[allow(clippy::needless_collect)]`