#![allow(dead_code, deprecated, unused_variables, unused_mut)]
#![feature(try_find)]
use std::num::NonZero;
fn main() {
    let a = [3, 5, 7, 4, 9, 0, 11u32];
    let result = a
        .into_iter()
        .try_find(|&x| NonZero::new(x).map(|y| y.is_power_of_two()));
    assert_eq!(result, Some(Some(4)));
    let result = a
        .into_iter()
        .take(3)
        .try_find(|&x| NonZero::new(x).map(|y| y.is_power_of_two()));
    assert_eq!(result, Some(None));
    let result = a
        .into_iter()
        .rev()
        .try_find(|&x| NonZero::new(x).map(|y| y.is_power_of_two()));
    assert_eq!(result, None);
}