leetcode sum of 2 from list

twosum.js

/**
 * @param {number[]} nums
 * @param {number} target
 * @return {number[]}
 */
function twoSum(nums, target) {
  let mp = new Map()

  for (let i = 0; i < nums.length; i++) {
    let diff = target - nums[i]

    if (mp.has(diff)) {
      return [i, mp.get(diff)]
    }
    mp.set(nums[i], i)
  }
};