088-merge-sorted-array/merge-sorted-array.js

// Given two sorted integer arrays nums1 and nums2, merge nums2 into nums1 as one sorted array.
//
// Note:
//
//
// 	The number of elements initialized in nums1 and nums2 are m and n respectively.
// 	You may assume that nums1 has enough space (size that is greater or equal to m + n) to hold additional elements from nums2.
//
//
// Example:
//
//
// Input:
// nums1 = [1,2,3,0,0,0], m = 3
// nums2 = [2,5,6],       n = 3
//
// Output: [1,2,2,3,5,6]
//
//


/**
 * @param {number[]} nums1
 * @param {number} m
 * @param {number[]} nums2
 * @param {number} n
 * @return {void} Do not return anything, modify nums1 in-place instead.
 */

var merge = function(nums1, m, nums2, n) {
  var i = m - 1, j = n -1, k = m + n - 1
  while (i >= 0 && j >= 0) {
    nums1[k--] = nums1[i] < nums2[j] ? nums2[j--] : nums1[i--]
  }
  while (j >= 0) {
    nums1[k--] = nums2[j--]
  }
};