#![allow(dead_code, deprecated, unused_variables, unused_mut)]
use std::cmp::Ordering;
fn main() {
    assert_eq!(
        [1.0, f64::NAN].iter().partial_cmp([2.0, f64::NAN].iter()), Some(Ordering::Less)
    );
    assert_eq!(
        [2.0, f64::NAN].iter().partial_cmp([1.0, f64::NAN].iter()),
        Some(Ordering::Greater)
    );
    assert_eq!([f64::NAN, 1.0].iter().partial_cmp([f64::NAN, 2.0].iter()), None);
}