Remove Duplicates from Sorted Array | LeetCode 26

[Written explanation will be added soon]

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Here is the full implementation.

/**
 * @param {number[]} nums
 * @return {number}
 */
let removeDuplicates = function(nums) {
  if (!nums.length) {
    return 0;
  }

  let pointer1 = 0;
  for (let pointer2 = 1; pointer2 < nums.length; pointer2++) {
    if (nums[pointer1] !== nums[pointer2]) {
      pointer1++;
      nums[pointer1] = nums[pointer2];
    }
  }

  return pointer1 + 1;
};