let people = { name: null, age: null };
let result = { name: '張三',  age: 16 };
 
({ name: people.name, age: people.age} = result);
console.log(people) // {"name":"張三","age":16}###

const {length : a} = '1234';
console.log(a) // 4

const arr = [1, 2, 3];
const { 0: first, length, [length - 1]: last } = arr;
first; // 1
last; // 3
length; // 3

export function transfromNumber(number){
  const  INDEX_MAP = ['零'，'一'.....]
  if(!number) return
  if(number === 10) return INDEX_MAP[number]
  return [...number.toString()].reduce( (pre, cur) => pre  + INDEX_MAP[cur] , '' )
}

/* 1.任何整數(shù)都會(huì)被1整除，即余數(shù)是0。利用這個(gè)規(guī)則來(lái)判斷是否是整數(shù)。但是對(duì)字符串不準(zhǔn)確 */
function isInteger(obj) {
 return obj%1 === 0
}
 
/* 1. 添加一個(gè)是數(shù)字的判斷 */
function isInteger(obj) {
 return typeof obj === 'number' && obj%1 === 0
}
 
/* 2. 使用Math.round、Math.ceil、Math.floor判斷 整數(shù)取整后還是等于自己。利用這個(gè)特性來(lái)判斷是否是整數(shù)*/
function isInteger(obj) {
 return Math.floor(obj) === obj
}
 
/* 3. 通過(guò)parseInt判斷 某些場(chǎng)景不準(zhǔn)確 */
function isInteger(obj) {
 return parseInt(obj, 10) === obj
}
 
/* 4. 通過(guò)位運(yùn)算符*/
function isInteger(obj) {
 return (obj | 0) === obj
}

@media (prefers-color-scheme: dark) { //... } 
@media (prefers-color-scheme: light) { //... }

window.addEventListener('theme-mode', event =>{ 
    if(event.mode == 'dark'){}
   if(event.mode == 'light'){} 
})
 
window.matchMedia('(prefers-color-scheme: dark)') .addEventListener('change', event => { 
    if (event.matches) {} // dark mode
})

shuffle(arr) {
      return arr.sort(() => 0.5 - Math.random()). sort(() => 0.5 - Math.random());
 },

function shuffle(arr) {
  for (let i = arr.length - 1; i > 0; i--) {
    const randomIndex = Math.floor(Math.random() * (i + 1))
    ;[arr[i], arr[randomIndex]] = [arr[randomIndex], arr[i]]
  }
  return arr
}

function randomBool() {
    return 0.5 - Math.random()
}

function (arr){
    return arr.push(arr.shift());
}

function(arr){
  return arr.unshift(arr.pop());
}

function uniqueArr(arr){
    return [...new Set(arr)]
}

function scrollTo(element) {
    element.scrollIntoView({ behavior: "smooth", block: "start" }) // 頂部
    element.scrollIntoView({ behavior: "smooth", block: "end" }) // 底部
    element.scrollIntoView({ behavior: "smooth"}) // 可視區(qū)域
}

function getRandomColor(){
    return `#${Math.floor(Math.random() * 0xffffff) .toString(16)}`;
}

function isEmpty(obj){
    return  Reflect.ownKeys(obj).length === 0 && obj.constructor === Object;
}

function toBoolean(value, truthyValues = ['true']){
  const normalizedValue = String(value).toLowerCase().trim();
  return truthyValues.includes(normalizedValue);
}
toBoolean('TRUE'); // true
toBoolean('FALSE'); // false
toBoolean('YES', ['yes']); // true

const clone = (arr) => arr.slice(0);
const clone = (arr) => [...arr];
const clone = (arr) => Array.from(arr);
const clone = (arr) => arr.map((x) => x);
const clone = (arr) => JSON.parse(JSON.stringify(arr));
const clone = (arr) => arr.concat([]);
const clone = (arr) => structuredClone(arr);

function compare(a, b){
    return a.getTime() > b.getTime();
}

function monthDiff(startDate, endDate){
    return  Math.max(0, (endDate.getFullYear() - startDate.getFullYear()) * 12 - startDate.getMonth() + endDate.getMonth());
}

function extract(date){
   const d = new Date(new Date(date).getTime() + 8*3600*1000);
  return new Date(d).toISOString().split(/[^0-9]/).slice(0, -1);
}
console.log(extract(new Date())) // ['2022', '09', '19', '18', '06', '11', '187']

function isFunction(v){
   return ['[object Function]', '[object GeneratorFunction]', '[object AsyncFunction]', '[object Promise]'].includes(Object.prototype.toString.call(v));
}

function distance(p1, p2){
    return `Math.sqrt(Math.pow(p2.x - p1.x, 2) + Math.pow(p2.y - p1.y, 2));
}

function overlaps = (a, b) {
   return (a.x1 < b.x2 && b.x1 < a.x2) || (a.y1 < b.y2 && b.y1 < a.y2);
}

function isNode(){
    return typeof process !== 'undefined' && process.versions != null && process.versions.node != null;
}

function sum(...args){
    args.reduce((a, b) => a + b);
}