loop.rs

pub fn combine_all_option<T>(xs: &Vec<T>) -> Option<T>
where
    T: Semigroup + Clone,
{
    match xs.first() {
        Some(head) => {
            // Dear lord this reads horribly
            xs[1..].iter().fold(Some((*head).clone()), |acc, x| acc.combine(&Some((*x).clone())))
        }
        _ => None
    }
//    match xs.first() {
//        Some(ref head) => {
//            let tail = xs[1..].to_vec();
//            // TODO figure out how to write this as a fold
//            let mut x = (*head).clone();
//            for i in tail {
//                x = x.combine(&i)
//            }
//            Some(x)
//        }
//        _ => None,
//    }
}