dotproto

// http://ejohn.org/blog/objectgetprototypeof/
function instanceOf(object, constructor) {
  while (object != null) {
    if (object == constructor.prototype) {
      return true;
    }
    object = Object.getPrototypeOf(object);
  }
  return false;
}

dotproto

// == PARENT ===================================================================

// CONSTRUCTOR
// For this demo we'll be inheriting from the Parent class
function Parent() {}

// METHODS
Parent.prototype.foo = function foo() {
  return 'FOO';
}

dotproto

javascript: {
  /* Adjust voice speed. Default = 1 */
  var speed = 2.5;
  
  if (window.runTTS === undefined) {

    /* Text to Speech function. Adjust the value of msg.rate to increase/decrease the playback speed. */
    window.runTTS = () => {
      const text = window.getSelection().toString();
      

dotproto

let sourceObject = { foo: { bar: { baz: { qux: { value: "Hit!" } } } } };
sourceObject.foo[Symbol.for('symbol')] = 'symbol value';

function lookup(object, path) {
    path = Array.isArray(path) ? path : path.split('.');

    for(let i = 0; i < path.length; i++) {
        object = object[path[i]];

        if (!object) break;

dotproto

(function exposeNgUtil(target = window) {
  if (!angular) {
    console.error(`ERROR: ng-util cannot initialize because "angular" was not found!`);
    return null;
  }

  getScope = el => angular.element( (el || document.getElementsByClassName('ng-scope')[0]) )

  let ngUtils = {
    // Use Angular.js' DI system to retrieve a provider.

dotproto

// http://www.ecma-international.org/ecma-262/6.0/#sec-symbol.toprimitive

let base = {
  [Symbol.toPrimitive] : hint => {
    console.log(`toPrimitive hint: ${hint}`)
    return 1;
  },
  valueOf: () => 2,
  toString: () => '3',
};

dotproto

// Resources
// 
// - http://exploringjs.com/es6/ch_proxies.html
// - https://github.com/tvcutsem/harmony-reflect/issues/41
// - https://esdiscuss.org/topic/proxies-stratifying-tostring-valueof
// - https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy
// - https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Symbol/toPrimitive
// - https://console.spec.whatwg.org/#inspection

// NOTE: When Chrome logs "Symbol(Symbol.toPrimitive)", that corisponds to

dotproto

// ====================
// =  OBJECT HELPERS  =
// ====================
export const set = (obj, prop, val) => {
  obj[prop] = val
  return obj
}

export const extractObj = (obj, prop) =>
  Object.keys(obj).map(key =>

dotproto

// Open http://reactivex.io/rxjs/manual/overview.html to run this code

var timer = new Rx.Observable((obs) => {
  var counter = 0;
  var int = setInterval(() => obs.next(++counter), 1000);
  return () => {
    clearInterval(int);
    obs.complete();
  }
});

dotproto

const VOID = Symbol('VOID');

class LinkedItem {
  constructor(value) {
    this.value = value;
    this.next = null;
  }
}

class LinkedList {