1 2 3 4 5 6 7 8 9 10 11
pub fn ch_08_01() { let mut v = vec![1, 2, 3]; v.push(4); for i in &mut v { *i += 10; println!("{}", i); } let m = &v[1]; println!("{} {:?}", m, v.get(10).unwrap_or(&mut 4)); }