2026-09-05
Daily Tech Challenge
What does this program print, mutating a String with remove, insert and insert_str?
fn main() {
let mut s = String::from("hello");
let c = s.remove(1);
s.insert(0, 'J');
s.insert_str(2, "--");
println!("{} {}", c, s);
}Saturday, September 5, 2026 · A new challenge drops every day