/**
 * @param {number[]} nums
 * @param {number} target
 * @return {number[]}
 */
/*
var twoSum = function(nums, target) {
    var targetMap = new Map();
    var result = new Array();
    for(var i = 0; i < nums.length; i++)
        {
            var diff = target - nums[i];
            if(!targetMap.has(diff)){
                targetMap.set(nums[i],i);
            }else{
                result[0] = targetMap.get(diff);
                result[1] = i;
                return result;
            }
        }
    return result;
};
*/
const twoSum = function(nums, target) {
    const comp = {};
    for(let i=0; i<nums.length; i++){
        if(comp[nums[i] ]>=0){
            return [ comp[nums[i] ] , i]
        }
        comp[target-nums[i]] = i
    }
};