rustHow to iterate btreemap in Rust

Iterating over a BTreeMap in Rust can be done using the iter() method. This method returns an iterator over the entries of the map, which can then be used to access the key-value pairs.

Example code

use std::collections::BTreeMap;

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

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

Output example

key: a value: 1
key: b value: 2

Code explanation

• use std::collections::BTreeMap;: imports the BTreeMap type from the std::collections module.
• let mut map = BTreeMap::new();: creates a new empty BTreeMap.
• map.insert("a", 1);: inserts a key-value pair into the BTreeMap.
• for (key, value) in map.iter() {: starts an iterator loop over the entries of the BTreeMap.
• println!("key: {} value: {}", key, value);: prints the key and value of the current entry.

Helpful links

• Rust Documentation - BTreeMap

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