rustHow to map a Rust HashMap?

Mapping a Rust HashMap is a simple process. It involves creating a new HashMap, inserting key-value pairs, and then iterating over the HashMap to access the values.

Example code

use std::collections::HashMap;

fn main() {
    let mut map = HashMap::new();
    map.insert("key1", "value1");
    map.insert("key2", "value2");

    for (key, value) in &map {
        println!("{}: {}", key, value);
    }
}

Output example

key1: value1
key2: value2

Code explanation

1. use std::collections::HashMap;: This imports the HashMap type from the standard library.

2. let mut map = HashMap::new();: This creates a new, empty HashMap.

3. map.insert("key1", "value1");: This inserts a key-value pair into the HashMap.

4. for (key, value) in &map {: This iterates over the HashMap, giving access to the keys and values.

5. println!("{}: {}", key, value);: This prints out the key and value for each iteration.

Helpful links

• Rust HashMap Documentation

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