pub struct Person {
    pub name: String,
}

fn main() {
    let mut ppl: Vec<Person> = vec![];
    ppl.push(Person{name: "Joe".to_owned()});
    ppl.push(Person{name: "Mike".to_owned()});

    (&mut ppl[0]).name = "AA".to_owned();
    (&mut ppl[1]).name = "BB".to_owned();

    for pp in &ppl {
        println!("{}", pp.name);
    }
}