use std::convert::TryFrom as _;

fn main() {
    let s = &b"abcde"[..];
    let [a, b, c, d, e] = <&[_; 5]>::try_from(s).unwrap();
    dbg!(a);
    dbg!(b);
    dbg!(c);
    dbg!(d);
    dbg!(e);

    let params = vec![1, 2, 3, 4, 5];

if let [n, a, b, c, d] = params[0..5] {

    println!("{} {} {} {} {}", n, a, b, c, d);

}
}