rustHow to iterate sorted hashmap in Rust

Iterating over a sorted hashmap in Rust can be done using the iter() method. This method returns an iterator over the key-value pairs in the map, in ascending order by key.

Example code

use std::collections::HashMap;

let mut map = HashMap::new();
map.insert("a", 1);
map.insert("b", 2);
map.insert("c", 3);

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

Output example

a: 1
b: 2
c: 3

Code explanation

• use std::collections::HashMap: imports the HashMap type from the std::collections module.
• let mut map = HashMap::new(): creates a new, empty HashMap instance.
• map.insert("a", 1): inserts a key-value pair into the HashMap.
• for (key, value) in map.iter(): iterates over the key-value pairs in the HashMap, in ascending order by key.
• println!("{}: {}", key, value): prints the key and value of the current iteration.

Helpful links

• HashMap documentation

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