remove-duplicates-from-sorted-array.js

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