trpl-zh-cn/listings/ch08-common-collections/no-listing-03-iterate-over-hashmap/src/main.rs

fn main() {
    // ANCHOR: here
    use std::collections::HashMap;

    let mut scores = HashMap::new();

    scores.insert(String::from("Blue"), 10);
    scores.insert(String::from("Yellow"), 50);

    for (key, value) in &scores {
        println!("{}: {}", key, value);
    }
    // ANCHOR_END: here
}