Stdle #106 · closures · 2026-09-20
What does this Rust snippet output?
A past puzzle — fully playable. 4 attempts, hints on wrong guesses.
fn main() { let factor = 3; let v = vec![1, 2, 3]; let s: i32 = v.iter().map(|x| x * factor).sum(); println!("{}", s);}Closures