Generating Subsets From Unique Integers In An Array
Generate all subsets from given unique integers, no duplicates allowed, return in any order
78. Subsets
Medium
Given an integer array nums of unique elements, return all possible subsets1 (the power set).
The solution set must not contain duplicate subsets. Return the solution in any order.
Example 1:
Input: nums = [1,2,3]
Output: [[],[1],[2],[1,2],[3],[1,3],[2,3],[1,2,3]]
Example 2:
Input: nums = [0]
Output: [[],[0]] 
Constraints:
1 <= nums.length <= 10
-10 <= nums[i] <= 10
All the numbers of nums are unique.
Solution:
class Solution {
    /**
     * @param Integer[] $nums
     * @return Integer[][]
     */
    function subsets($nums) {
        $ans = [[]];    
        foreac...
            