himeshvats19

function fun(…input){
  let sum = 0;
  for(let i of input){
    sum+=i;
  }
  return sum;
}
console.log(fun(1,2)); //3
console.log(fun(1,2,3)); //6
console.log(fun(1,2,3,4,5)); //15

himeshvats19

function fun(a, b){
 return a + b;
}
console.log(fun(1, 2)); // 3
console.log(fun(1, 2, 3, 4, 5)); // 3

himeshvats19

function fun(a, b){
  return a + b;
}
console.log(fun(1, 2)); // 3
console.log(fun(1, 2, 3, 4, 5)); // 3

himeshvats19

let arr = [1,2,3]; 
let arr2 = [4,5]; 
  
arr = [...arr,...arr2]; 
console.log(arr); // [ 1, 2, 3, 4, 5 ] 

himeshvats19

let arr = [1,2,3]; 
let arr2 = [4,5]; 
  
arr = arr.concat(arr2); 
  
console.log(arr); // [ 1, 2, 3, 4, 5 ] 

himeshvats19

import {port, getAccounts} from 'module'
console.log(port) // 3000

himeshvats19

export var port = 3000
export function getAccounts(url) {
  ...
}

himeshvats19

class baseModel {
  constructor(options = {}, data = []) { // class constructor
    this.name = 'Base'
    this.url = 'http://azat.co/api'
    this.data = data
    this.options = options
  }

    getName() { // class method
      console.log(`Class name: ${this.name}`)

himeshvats19

function calculateTotalAmount (vip) {
  var amount = 0 // probably should also be let, but you can mix var and let
  if (vip) {
    let amount = 1 // first amount is still 0
  } 
  { // more crazy blocks!
    let amount = 100 // first amount is still 0
    {
      let amount = 1000 // first amount is still 0
      }

himeshvats19

function calculateTotalAmount (vip) {
  var amount = 0
  if (vip) {
    var amount = 1
  }
  { // more crazy blocks!
    var amount = 100
    {
      var amount = 1000
      }