var promises = [];

​

function doTask(taskId) {

  var deferred = Q.defer(); //init promise

  setTimeout(function () {

    console.log("Done with " + taskId);

    deferred.resolve("Finished " + taskId);

  }, Math.floor(Math.random() * 3000));

  promises.push(deferred.promise);

}

​

["task1", "task2", "task3"].forEach(function(task) {

 doTask(task);

});

​

Q.allSettled(promises).then(function(results) {

  console.log("All done");

  results.forEach(function(result) {

    console.log(result);

  });

});

​