OMGZui

class Observer {    
  constructor (fn) {      
    this.update = fn;
  }
}
class Subject {    
    constructor() {        
        this.observers = []; 
    }    
    addObserver(observer) {          

OMGZui

class User {
  constructor(name, auth) {
    this.name = name
    this.auth = auth
  }
}

class UserFactory {
  static createUser(name, auth) {
    if(auth === 'admin')  new User(name, 1)

OMGZui

class SingletonLogin {
  constructor(name,password){
    this.name = name;
    this.password = password;
  }
  static getInstance(name,password){
    if(!this.instance)this.instance = new SingletonLogin(name,password);
    return this.instance;
  }
}

OMGZui

const heapSort = array => {
	for (let i = Math.floor(array.length / 2 - 1); i >= 0; i--) {
		heapify(array, i, array.length);
	}
	for (let i = Math.floor(array.length - 1); i > 0; i--) {
		swap(array, 0, i);
		heapify(array, 0, i);
	}
	return array;
};

OMGZui

function mergeSort(arr) {
    if(arr.length <= 1) return arr;
    const midIndex = arr.length/2 | 0;
    const leftArr = arr.slice(0, midIndex);
    const rightArr = arr.slice(midIndex, arr.length);
    return merge(mergeSort(leftArr), mergeSort(rightArr));
}

function merge(leftArr, rightArr) {
    const result = [];

OMGZui

function quickSort(arr, left, right) {
    if (left < right) {
        let pos = left - 1;
        for(let i = left; i <= right; i++) {
            let pivot = arr[right];
                pos++;
                let temp = arr[pos];
                arr[pos] = arr[i];
                arr[i] = temp;
            }

OMGZui

function quickSort(arr) {
    if(arr.length <= 1) return arr;
    const pivot = arr.length / 2 | 0;
    const pivotValue = arr.splice(pivot, 1)[0];
    const leftArr = [];
    const rightArr = [];
    arr.forEach(val => {
        val > pivotValue ? rightArr.push(val) : leftArr.push(val);
    })
    return [ ...quickSort(leftArr), pivotValue, ...quickSort(rightArr)];

OMGZui

function bubbleSort(arr){
  for(let i = 0; i < arr.length; i++) {
  let flag = true
    for(let j = 0; j < arr.length - i - 1; j++) {
      if(arr[j] > arr[j+1]) {
        flag = false
        let temp = arr[j]
        arr[j] = arr[j+1]
        arr[j+1] = temp
      }

OMGZui

function bubbleSort(arr){
  for(let i = 0; i < arr.length; i++) {
    for(let j = 0; j < arr.length - i - 1; j++) {
      if(arr[j] > arr[j+1]) {
        let temp = arr[j]
        arr[j] = arr[j+1]
        arr[j+1] = temp
      }
    }
  }

OMGZui

public class StudentTest {
    @Test
    public void test(){
       ApplicationContext context = new ClassPathXmlApplicationContext("beans.xml");
        Student student = (Student) context.getBean("student");
        System.out.println(student.getName());
    }
}