removeDuplicatesII.js

/**
 * @param {number[]} nums
 * @return {number}
 */
var removeDuplicates = function (nums) {
    for (let i = 0; i < nums.length; i++) {
        let counter = 1
        for (let j = i + 1; j < nums.length; j++) {
            if (nums[i] === nums[j]) {
                counter++
                if (counter > 2) {
                    nums.splice(i, 1)
                    j--
                }
            }
        }
    }
};


/*
Example 1:

Input: nums = [1,1,1,2,2,3]
Output: 5, nums = [1,1,2,2,3,_]
Explanation: Your function should return k = 5, with the first five elements of nums being 1, 1, 2, 2 and 3 respectively.
It does not matter what you leave beyond the returned k (hence they are underscores).

Example 2:

Input: nums = [0,0,1,1,1,1,2,3,3]
Output: 7, nums = [0,0,1,1,2,3,3,_,_]
Explanation: Your function should return k = 7, with the first seven elements of nums being 0, 0, 1, 1, 2, 3 and 3 respectively.
It does not matter what you leave beyond the returned k (hence they are underscores).
*/