2535. Difference Between Element Sum and Digit Sum of an Array.js

// You are given a positive integer array nums.

// The element sum is the sum of all the elements in nums.
// The digit sum is the sum of all the digits (not necessarily distinct) that appear in nums.
// Return the absolute difference between the element sum and digit sum of nums.

// Note that the absolute difference between two integers x and y is defined as |x - y|.

// Example 1:

// Input: nums = [1,15,6,3]
// Output: 9
// Explanation:
// The element sum of nums is 1 + 15 + 6 + 3 = 25.
// The digit sum of nums is 1 + 1 + 5 + 6 + 3 = 16.
// The absolute difference between the element sum and digit sum is |25 - 16| = 9.
// Example 2:

// Input: nums = [1,2,3,4]
// Output: 0
// Explanation:
// The element sum of nums is 1 + 2 + 3 + 4 = 10.
// The digit sum of nums is 1 + 2 + 3 + 4 = 10.
// The absolute difference between the element sum and digit sum is |10 - 10| = 0.

const differenceOfSum = nums =>
	Math.abs(
		nums.reduce((p, v) => p + v) -
			nums
				.join('')
				.split('')
				.reduce((p, v) => p + +v, 0)
	)
// const differenceOfSum = nums => {
// 	let sum1 = 0,
// 		sum2 = 0
// 	for (let key of nums) {
// 		sum1 += key
// 		for (let j of String(key).split('')) {
// 			sum2 += +j
// 		}
// 	}
// 	return sum1 - sum2
// }