/**

* @param {number[]} nums

* @param {number} target

* @return {number[]}

*/

const numArrOne = [2, 7, 11, 8, 14, 6], targetOne = 9; // [0, 1]

const numArrTwo = [3, 4, 2, 8, 15, 20], targetTwo = 6; // [1, 2]

const numArrThree = [16, 22, 7, 4, 8], targetThree = 12; // [3, 4]

const twoSum = (nums, target) => {

const comp = {};

for (let i = 0; i < nums.length; i++) {

// if the value of a property that is the current item in the array is greater that or equal to 0, then return an array with that value and the current index

if (comp[nums[i]] >= 0) {

return [comp[nums[i]], i];

}

// add the target minus the current index value in to comp as a key and its vaule as the current index

comp[target - nums[i]] = i;

}

};

console.log('numArrOne', twoSum(numArrOne, targetOne));

console.log('numArrTwo', twoSum(numArrTwo, targetTwo));

console.log('numArrThree', twoSum(numArrThree, targetThree));