dot product

gistfile1.rs

fn dot<T: Add<T, T> + Mul<T, T> + Zero>(u: ~[T], v: ~[T]) -> T {

        let mut acc = Zero::zero();
        let mut it = u.iter().zip(v.iter());
        loop {
                match it.next() {
                        Some((u, v)) => { acc = acc + *u * *v }
                        _ => { break; }
                }
        }
        acc 
}