use itertools::{Itertools, MinMaxResult::MinMax};
use std::mem::swap;

fn swap_hi_lo(v: &mut [u8]) {
    if let MinMax(lo, hi) = v.iter_mut().minmax() {
        swap(lo, hi);
    }
}

fn main() {
    let mut rgb = [0, 255, 128];
    swap_hi_lo(&mut rgb);
    println!("{:?}", rgb);
}