Code shared from the Rust Playground

playground.rs

fn main() {
    let a = find_min(vec![-9, 1, 2, 3, 4]);
    let b = find_min(vec![100, 10, 20, 30, 40]);
    println!("{:?} {:?}", a, b);
}

fn find_min<T>(data: Vec<T>) -> Option<T> {
    let mut it = data.into_iter();
    let mut min = match it.next() {
        Some(elem) => elem,
        None => return None,
    };
    for elem in it {
        if elem < min {
            min = elem;
        }
    }
    Some(min)
}