rustHow to use a bidirectional Rust HashMap?

A bidirectional Rust HashMap is a data structure that allows for efficient lookup of keys and values. It is implemented using a hash table, which allows for fast lookups and insertion of elements.

Example code

use std::collections::HashMap;

let mut map = HashMap::new();

map.insert("foo", "bar");
map.insert("baz", "qux");

let value = map.get("foo");
println!("{:?}", value);

Output example

Some("bar")

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("foo", "bar");: This inserts a key-value pair into the HashMap.

4. let value = map.get("foo");: This retrieves the value associated with the given key from the HashMap.

5. println!("{:?}", value);: This prints the retrieved value to the console.

Helpful links

• Rust Documentation - HashMap

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