rustHow to implement a HashMap in Rust?

A HashMap in Rust can be implemented using the HashMap type from the std::collections module.

use std::collections::HashMap;

let mut map = HashMap::new();

map.insert("key1", "value1");
map.insert("key2", "value2");

println!("{:?}", map);

Output example

{"key1": "value1", "key2": "value2"}

The code above creates a new HashMap and inserts two key-value pairs into it. The insert method takes two parameters, the key and the value, and adds them to the map. The println! macro prints the contents of the map.

Parts of the code:

• use std::collections::HashMap;: imports the HashMap type from the std::collections module.
• let mut map = HashMap::new();: creates a new HashMap and assigns it to the map variable.
• map.insert("key1", "value1");: inserts a key-value pair into the map.
• println!("{:?}", map);: prints the contents of the map.

Helpful links

• Rust HashMap Documentation

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