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@fancellu
Created February 6, 2024 19:14
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Sum up a vector of optional numbers
use std::iter::Sum;
fn sum_with_missing<T: Sum + Copy>(vec: &Vec<Option<T>>) -> T {
vec.into_iter().filter_map(|x| *x).sum()
}
fn main() {
let mut v = vec![Some(1), Some(2), Some(3), None, Some(5)];
println!("{}", sum_with_missing(&v));
v.push(Some(10));
println!("{}", sum_with_missing(&v));
let mut f = vec![Some(1.0), Some(2.0), Some(3.0), None, Some(5.1)];
println!("{}", sum_with_missing(&f));
}
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fancellu commented Feb 6, 2024

Outputs

11
21
11.1

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