deepak

//output
repl: Line 30: Direct super call is illegal in non-constructor, use super.doWork() instead
  28   | 
  29   |   doWork() {
> 30   |     let person = super();
       |                  ^
  31   |     return `${person} paid`;
  32   |   }
  33   | }

deepak

// output
10

// generated code
"use strict";

var numbers = regeneratorRuntime.mark(function callee$0$0(start, end) {
  var i;
  return regeneratorRuntime.wrap(function callee$0$0$(context$1$0) {
    while (1) switch (context$1$0.prev = context$1$0.next) {

deepak

let s = new Set([1,2,3]);
s.add("foo");

console.log(s.size);

deepak

let pr1 = new Promise( (resolve, reject) => {
  resolve(1);
});

// ignored value.
// would have been nice of function is required to have correct arguments
// TODO: try with JSHint
pr1.then( () => {
  console.log("hello");
})

deepak

var flag = false;
var promise = Promise.resolve();

// not linear execution of code! 
// is the then callback pushed onto the call-stack. how ?
promise.then( (x) => {
  console.log(`flag is ${flag}`); // flag is true
})

flag = true

deepak

function getStockPrice() {
   seq.throw('oops! could not get stock price');
   // seq.next(80);
}

function executeTrade() {
   setTimeout(function() {
      console.log("trade done");
      seq.next(true);
   }, 300);

deepak

works if generator is not calling another function ?

example from http://davidwalsh.name/es6-generators-dive
similar example at https://gist.github.com/deepak/9a7337d7a641f8af9c8b

deepak

let price = 10;

let stockPrice = function () {
  // iterator.next(price++); // throws a "Generator is already running" error
  return price++
}

let oops = function () {
  throw new Error("oops!");
}

deepak

let price = 10;

let stockPrice = function () {
  setTimeout(function() {
    iterator.next(price++);
    console.log(price); //=> 10
    // why is this logged ? next does not behave like return ?
    // and it is always 10. "price++" did not increment value of price
  }, 300);
}

deepak

let price = 10;

let stockPrice = function () {
  setTimeout(function() {
    iterator.next(price++);
  }, 300);
}

let errorInStockPrice = function() {
  setTimeout(function() {