Function iter

publication/code/chapter06/hashmap.rs:242–259

()

    }

    fn iter() {
        let mut hmap = HashMap::new(11);
        hmap.insert(2,"dog");
        hmap.insert(3,"tiger");
        hmap.insert(10,"cat");

        for item in hmap.iter() {
            println!("val: {item}");
        }

        for item in hmap.iter_mut() {
            *item = "fish";
        }

        for item in hmap.iter() {
            println!("val: {item}");
        }
    }
}