shahab570

function sum(...args) {
  let sum =0 ;
  for (let arg of args) {
    sum += arg;
  }
  console.log(sum);
}
sum(1,2,3,4);   // 10

shahab570

let sum = function (x, y, z) {
  return new Promise((resolve, reject) => {
    let sum = x + y + z;
    resolve(sum);
  });
};

let average = function (total) {
  return new Promise((resolve, reject) => {
    let average = total / 3;

shahab570

let take_bath = new Promise((resolve, reject) => {
  setTimeout(() => {
    resolve("I have finished my bath");
  }, 5000);
});

let eat = new Promise((resolve, reject) => {
  setTimeout(() => {
    resolve("I have finished eating");
  }, 3000);

shahab570

let take_bath = new Promise((resolve, reject) => {
  setTimeout(() => {
    resolve("I have finished my bath");
  }, 5000);
});

let eat = new Promise((resolve, reject) => {
  setTimeout(() => {
    reject("I have finished eating");
  }, 3000);

shahab570

let take_bath = new Promise((resolve, reject) => {
  setTimeout(() => {
    resolve("I have finished my bath");
  }, 5000);
});

let eat = new Promise((resolve, reject) => {
  setTimeout(() => {
    resolve("I have finished eating");
  }, 3000);

shahab570

var words = ["This", "is", "john", "Doe"];
var first = words[0];
var second = words[1];
console.log(first);     //This
console.log(second);    // is

shahab570

var words = ["This", "is", "john", "Doe"];
var [first, second] = words;
console.log(first);    //This
console.log(second);   //is

shahab570

var [first, second, third] = "USA";
console.log(first);   //U
console.log(second);  //S
console.log(third);   //A

shahab570

var words = ["This", "is", "john", "Doe"];
var [first, , third] = words;
console.log(third);   //john

shahab570

var words = ["This", "is", "john", "Doe"];
var [first, ...last] = words;
console.log(last); //["is","john","Doe"];