80.Remove_Duplicates_from_Sorted_Array_II.js

/**
 * @param {number[]} nums
 * @return {number}
 */
var removeDuplicates = function (nums) {
    let i = 2;
    while (i < nums.length) {
        if (nums[i] === nums[i - 2]) {
            nums.splice(i, 1)
        } else {
            i++
        }
    }
    return nums.length;
};