rendezvous with cassidoo #188 - Interview question of the week

maxNum.js

/**
 * From: https://buttondown.email/cassidoo/archive/i-never-dreamed-about-success-i-worked-for-it/
 * @param {number[]} m Integer Array.
 * @param {number[]} n Integer Array.
 * @param {number} k Integer.
 * @returns {number} Using the digits from `n` and `m`, return the largest number of length `k`.
 * @example
 * n = [3,4,6,5]
 * m = [9,0,2,5,8,3]
 * k = 5
 * $ maxNum(n, m, k)
 * -> 98655
 */
function maxNum (m, n, k) {
	let digits = ""

	for (let nums = [...m, ...n], max = [0, 0]; digits.length < k; nums[max[0]] = NaN, digits += max[1], max = [0, 0])
		for (let i = 0; i < nums.length; i++)
			if (nums[i] > max[1]) max = [i, nums[i]]

	return parseInt(digits)
}