#![allow(dead_code, deprecated, unused_variables, unused_mut)]
#![feature(cmp_minmax)]
use std::cmp;
fn main() {
    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]);
    let [min, max] = cmp::minmax_by_key(-42, 17, |x: &i32| x.abs());
    assert_eq!(min, 17);
    assert_eq!(max, - 42);
}