use std::collections::HashMap;

fn main() {
    let mut hm: HashMap<String, [String; 2]> = HashMap::new();
    let mut hm1: HashMap<String, i32> = HashMap::new();
    let arr = ["a".to_string(), "b".to_string()];
    hm.insert("xyz".to_string(), arr);
    for s in arr.iter() {
        hm1.entry(s).or_insert(0);
    }
}