Stdle #11 · closures · 2026-06-17
What does this Rust snippet output?
A past puzzle — fully playable. 4 attempts, hints on wrong guesses.
fn main() { let mut v = vec![1, 2, 3]; let len = || v.len(); let n = len(); v.push(4); println!("{} {}", n, v.len());}Closures