RUST

rust concatenate vectors

fn main() {
    let mut a = vec![1, 2, 3];
    let mut b = vec![4, 5, 6];

    a.append(&mut b);

    assert_eq!(a, [1, 2, 3, 4, 5, 6]);
    assert_eq!(b, []);
}

rust concat

let s = concat!("test", 10, 'b', true); // concatenates string literals
assert_eq!(s, "test10btrue");