laser

function* fibonacci() {
  var a = 0, b = 1, c = 0;

  while (true) {
    yield a;
    c = a;
    a = b;
    b = c + b;
  }
}

laser

setTimeout(function(){
  _get("/something.ajax?greeting", function(err, greeting) {
    if (err) { console.log(err); throw err; }
    _get("/else.ajax?who&greeting="+greeting, function(err, who) {
      if (err) { console.log(err); throw err; }
      console.log(greeting+" "+who);
    });
 });
}, 1000);

laser

sync(function* (resume) {
  try (e) {
    yield setTimeout(resume, 1000);
    var greeting = yield _get('/something.ajax?greeting', resume)
    var who = yield _get('/else.ajax?who&greeting=' + greeting, resume)
    console.log(greeting + ' ' + who)
  }
  catch (e) {
    console.log(e);
    throw e;  

laser

setTimeout(function(){
  _get("/something.ajax?greeting", function(err, greeting) {
    if (err) { console.log(err); throw err; }
    _get("/else.ajax?who&greeting="+greeting, function(err, who) {
      if (err) { console.log(err); throw err; }
      console.log(greeting+" "+who);
    });
 });
}, 1000);

laser

function procrastinatingAdd(x, y) {
  var errMsg = "Expected number and got ";
  setTimeout(function() {
    if (isNaN(x)) gen.throw(new TypeError(errMsg + typeof x));
    if (isNaN(y)) gen.throw(new TypeError(errMsg + typeof y));
    gen.next(x + y);
  }, 500);
}

var gen = function* () {

laser

// in the test code:

it("updates the page title on click", function() {
  assert.equals(view.find("h1").text(), "before update");
  
  view.find("button").trigger("click"); // uh oh-async!
  
  assert.equals(view.find("h1").text(), "after update"); // will fail due to callback being part of different stack
});

laser

function changeHeaderDeferred() {
  var header = document.getElementById("header");
  
  setTimeout(function changeHeader() {
    header.style.color = "red";

    return false;
  }, 100);

  return false;

laser

// our main code, in a <script>-tag in our HTML page
var piWorker = new Worker("pi_calculator.js");
var logResult = function(e) {
  console.log("PI: " + e.data);
};

piWorker.addEventListener("message", logResult, false);
piWorker.postMessage(100000);

laser

// our worker, which does some CPU-intensive operation
var reportResult = function(e) {
  pi = SomeLib.computePiToSpecifiedDecimals(e.data);
  postMessage(pi);
};

onmessage = reportResult;

laser

function f() {
  console.log("foo");
  setTimeout(g, 0);
  console.log("baz");
  h();
}

function g() {
  console.log("bar");
}