stellaqx

"react-router": "^1.0.3",
"react-router-dom": "^5.2.0",
    
import {BrowserRouter as Router, Route, Link, Switch} from 'react-router-dom';

// Nested Route 
ReactDOM.render(
  (
  <Router>
    <Switch>

stellaqx

1. Remove Scene delegate methods from AppDelegate and delete the Scene delegate file.
2. remove UIApplicationSceneManifest from Info.plist.
3. we need to add a window property in AppDelegate `@property(nonatomic, strong) UIWindow *window;` For Swift, add `var window: UIWindow?`

stellaqx

https://docs.oracle.com/en/java/javase/11/install/installation-jdk-macos.html#GUID-F575EB4A-70D3-4AB4-A20E-DBE95171AB5F

stellaqx

class Solution {
public:
    /**
     * @param nums: A set of numbers
     * @return: A list of lists
     */
    vector<vector<int>> subsets(vector<int> &nums) {
        if (nums.size() == 0) {
            vector<vector<int>> res;
            vector<int> empty;

stellaqx

public class Solution {
    /**
     * @param nums: A set of numbers
     * @return: A list of lists
     */
    public List<List<Integer>> subsets(int[] nums) {
        Arrays.sort(nums);
        return helper(nums, nums.length - 1);
    }

stellaqx

/**
 * class SVNRepo {
 *     public:
 *     static bool isBadVersion(int k);
 * }
 * you can use SVNRepo::isBadVersion(k) to judge whether 
 * the kth code version is bad or not.
*/
class Solution {
public:

stellaqx

class Solution {
public:
    /**
     * @param nums: a rotated sorted array
     * @return: the minimum number in the array
     */
    int findMin(vector<int> &nums) {
        int n = nums.size();
        int start = 0, end = n - 1;
        if (nums[start] < nums[end]) return nums[start];