leetcode two sum

twosum.js

/**
Input: nums = [2,7,11,15], target = 9
Output: [0,1]
Output: Because nums[0] + nums[1] == 9, we return [0, 1].
*/

/**
 * @param {number[]} nums
 * @param {number} target
 * @return {number[]}
 */
var twoSum = function(nums, target) {
    let result=[];
    const map=new Map();
    for(let i in nums){
        if(map.has(nums[i])){
            result[0]=i;
            result[1]=map.get(nums[i]);
            return result;
        }
        else{
            map.set(target-nums[i],i);
        }
    }
};