nishanbajracharya

/**
 * Takes an object and checks if all given keys exist in the object.
 *
 * @param {Object} object
 * @param {String|Array} keys
 *
 * @returns Boolean
 */
export const hasKeys = (object, keys) => {
  if (!(object instanceof Array) && object instanceof Object) {

nishanbajracharya

var hello = document.getElementById('hello');

function Student(name, dob, el) {
  this.name = name;
  this.dob = dob;
  this.el = el;
  
  this.getProfile = function() {
    console.log('In Get Profile', this);
    return this.name + ' is an idiot';

nishanbajracharya

var hello = document.getElementById('hello');

function Student(name, dob, el) {
  var that = this;
  
  this.name = name;
  this.dob = dob;
  this.el = el;
  
  this.getProfile = function() {

nishanbajracharya

class Observer {
  constructor() {
    this.observers = [];
  }
  
  subscribe(fn) {
    this.observers.push(fn);
   
    return () => this.observers = this.observers.filter(subscriber => subscriber !== fn);
  }

nishanbajracharya

const ROMAN = {
  I: 1,
  V: 5,
  X: 10,
  L: 50,
  C: 100,
  D: 500,
  M: 1000
}

nishanbajracharya

class Subject {
  constructor(state) {
    this.state = state;
    this.observers = [];
  }

  getState() {
    return this.state;
  }

nishanbajracharya

class Observer {
  constructor(subject) {
    subject.registerObserver(this);

    this.subscribers = [];
  }

  subscribe(subscriber) {
    this.subscribers.push(subscriber);
  }

nishanbajracharya

const observable = new Subject(10);
const observerA = new Observer(observable);
const observerB = new Observer(observable);

observerA.subscribe(data => {
  console.log("observerA", data);
});

observerB.subscribe(data => {
  console.log("observerB", data);

nishanbajracharya

class Observer {
  constructor(state) {
    this.state = state;

    this.subscribers = [];
  }

  get() {
    return this.state;
  }

nishanbajracharya

const animate = document.getElementById('animate');

const btn = document.getElementById('btn');

let enabled = false;

btn.onclick = function() {
  if (enabled) {
    enabled = false;
    transition(animate, {