Function out::max_unstable_by_key
source · pub fn max_unstable_by_key<T, K: Ord>(
v: &mut [T],
n: usize,
cmp: impl FnMut(&T) -> K
) -> &mut [T] ⓘ
Expand description
Get the n
largest items with a key extraction function.
This method is not stable, i.e. it may not preserve the order of equal elements.
Examples
let mut v = [-5_i32, 4, 1, -3, 2];
let max = out::max_unstable_by_key(&mut v, 3, |a| a.abs());
assert_eq!(max, [-3, 4, -5]);