handling a vector and array. Note that the &a is a reference to the elements of array a which are on the stack. Vectors live on the heap.

rust.rs

fn main() {
    let tuple = array_and_vec();
    println!("{:?} array and {:?} vector", tuple.0, tuple.1);
}

fn array_and_vec() -> ([u32; 4], Vec<u32>) {
    let a = [1, 25, 200, 203];
    let mut v = Vec::new();
    // reference symbol in a (a pointer to the stack)
    for element in &a {
    // * is the derefernce with *
        v.push(*element);
    }
    (a, v)
}