two_sum.rs

fn two_sum(nums: Vec<i32>, target: i32) -> Vec<i32> {
    let mut map: HashMap<i32, i32> = HashMap::new();

    for (i, num) in nums.iter().enumerate() {
        let complement: i32 = target - nums[i];
        let i_i32 = i as i32;

        if map.contains_key(&complement) {
            let map_complement = *map.get(&complement).unwrap();

            return vec![map_complement, i_i32];
        }

        map.insert(*num, i_i32);
    }

    vec![]
}