Promises

Плюсы

1. Простота

Недостатки

1. Медленность
2. Блокируемость

Плюсы

1. Простота
2. Неблокируемость
3. Быстрее первого решения

Недостатки

1. Медленность

Плюсы

1. Простота)))
2. Неблокируемость

Недостатки

1. Много ресурсов

loginPromise

1. loginPromise.state
   1. pending
   2. done
   3. failed
2. loginPromise.done(f1)
3. loginPromise.fail(f2)
4. loginPromise.then(f1, f2)

Deferred

1. reject(error)
2. resolve(result)
3. promise

                new Promise(function(resolve, reject){
                	//resolve(results)	
                	//reject(error)	
                });
            

                (new Promise())
                	.then(loadImages)
                	.then(loadSounds)
                	.then(loadData)
                	.then(startGame)
            

                all([loadImages(), loadSounds(), loadData()])
                	.then(startGame)
            

                race([loadImages(), loadSounds(), loadData()])
                	.then(startGame)
            

                (new Promise())
                	.then(loadImages)
                	.then(renderImages)
                	.then(all([loadSound1(), loadSound2(), loadSound3()]))
                	.then(loadData)
                	.then(startGame)
            

                (new Promise())
                	.then(getTrips, errorCallback)
                	.then(getCountries, errorCallback)
                	.then(getHotels, errorCallback)
                	.then(getRooms, errorCallback)
            

                getHotels()
                	.then(doSmth, errorCallback)
            

Библиотеки

1. Q.js
2. when.js
3. RSVP.js
4. Deferred(jQuery, Dojo, WinJS)

                var gen = function* count(){
                	for (var x = 0; true; x++) {
                		yield x
                	}
                }
            

                var a = gen()
                a.next(); // => 0
                a.next(); // => 1
                a.next(); // => 2
            

                function* showFeed(){
                	var countries = yield getCountries();
                	renderCountries(countries);
                	var hotels = yield getHotels();
                	renderHotels(hotels);
                	var rooms = yield getRooms();
                	renderRooms(rooms);
                }