Function subsets

javascript/0078-subsets.js:7–11

(nums)

 * @return {number[][]}
 */
var subsets = (nums) => {
    nums.sort((a, b) => a - b);

    return dfs(nums);
};

var dfs = (nums, level = 0, set = [], subset = []) => {
    subset.push(set.slice());