trpl-zh-cn/listings/ch19-advanced-features/no-listing-15-map-closure/src/main.rs

fn main() {
    // ANCHOR: here
    let list_of_numbers = vec![1, 2, 3];
    let list_of_strings: Vec<String> =
        list_of_numbers.iter().map(|i| i.to_string()).collect();
    // ANCHOR_END: here
}