Function minmax_by_key

pub fn minmax_by_key<T, F, K>(v1: T, v2: T, f: F) -> [T; 2]
where
    F: FnMut(&T) -> K,
    K: Ord,

🔬This is a nightly-only experimental API. (cmp_minmax #115939)

Returns minimum and maximum values with respect to the specified key function.

Returns [v1, v2] if the comparison determines them to be equal.

Examples

#![feature(cmp_minmax)]
use std::cmp;

assert_eq!(cmp::minmax_by_key(-2, 1, |x: &i32| x.abs()), [1, -2]);
assert_eq!(cmp::minmax_by_key(-2, 2, |x: &i32| x.abs()), [-2, 2]);

// You can destructure the result using array patterns
let [min, max] = cmp::minmax_by_key(-42, 17, |x: &i32| x.abs());
assert_eq!(min, 17);
assert_eq!(max, -42);