350_Intersection_of_Two_Arrays_II.js

const intersect = (nums1, nums2) => {
  nums1.sort((a, b) => a - b);
  nums2.sort((a, b) => a - b);

  let i = 0;
  let j = 0;
  let result = [];

  while (nums1[i] !== undefined && nums2[j] !== undefined) {
    if (nums1[i] < nums2[j]) {
      i++;
    } else if (nums1[i] > nums2[j]) {
      j++;
    } else {
      result.push(nums1[i]);
      i++;
      j++;
    }
  }

  return result;
};