Stdle #57 · closures · 2026-08-02
What does this Rust snippet output?
A past puzzle — fully playable. 4 attempts, hints on wrong guesses.
fn main() { let mut data = vec![1, 2]; let snap = data.clone(); let f = move || snap.len(); data.push(9); println!("{} {}", f(), data.len());}Closures