fold sum

gistfile1.txt

fn sum<I>(i: I) -> I::Item
where
    I: Iterator,
    I::Item: From<u8> + std::ops::Add<Output = I::Item>,
{
    i.fold(From::from(0u8), std::ops::Add::add)
}

fn main() {
    let my_vec: Vec<u32> = (1..11).collect();
    // let my_vec_sum = (1..11).fold(0, std::ops::Add::add);
    let my_vec_sum = sum(1..11);
    println!("{:?}, sum: {}", my_vec, my_vec_sum);
}