// File name: 2sum.js

// Author: boasmarbun (https://github.com/boasmarbun)

// Date created: 02/10/2020

function twoSum (nums, target) {

var diff = 0;

for (var firstIndex = 0; firstIndex <= nums.length; firstIndex++) {

diff = target - nums[firstIndex];

var secondIndex = nums.indexOf(diff, firstIndex+1);

if(secondIndex != -1) {

return [firstIndex, secondIndex];

}

}

return [0];

};

// uncomment below for testing

// var testArray1 = [1,2,3,9]

// var target1 = 5

// var testArray2 = [0,3,4,0]

// var target2 = 0

// var testArray3 = [-2, -3, -7, -13, -6]

// var target3 = -8

// var testArray4 = []

// var target4 = 2

// console.log(twoSum(testArray1, target1))

// console.log(twoSum(testArray2, target2))

// console.log(twoSum(testArray3, target3))

// console.log(twoSum(testArray4, target4))