Function expensive_sum

exercise/threads_channels/src/main.rs:11–16

(v: Vec<i32>)

}

fn expensive_sum(v: Vec<i32>) -> i32 {
    // Pretend our fancy little filter-map-sum is expensive and takes 500ms
    sleep_ms(500);
    println!("Child thread: just about finished");
    v.iter().filter(|&x| x % 2 == 0).map(|x| x * x).sum()
}

fn main() {
    let my_vector = vec![2, 5, 1, 0, 4, 3];