deferred

问题 The Google Maps javascript does some heavy DOM manipulation. Even so, the fine docs suggest to load it with the defer flag: <script src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&callback=initMap" async defer></script> Why would the defer flag be suggested for a script that performs DOM manipulations? I ask to learn both about the defer flag and to learn about the Google Maps API as I seem to have a misunderstanding about what one of them is doing. 回答1: Normally, a script tag

问题 The Google Maps javascript does some heavy DOM manipulation. Even so, the fine docs suggest to load it with the defer flag: <script src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&callback=initMap" async defer></script> Why would the defer flag be suggested for a script that performs DOM manipulations? I ask to learn both about the defer flag and to learn about the Google Maps API as I seem to have a misunderstanding about what one of them is doing. 回答1: Normally, a script tag

问题 I have one class that extends DeferredResults and extends Runnable as shown below public class EventDeferredObject<T> extends DeferredResult<Boolean> implements Runnable { private Long customerId; private String email; @Override public void run() { RestTemplate restTemplate=new RestTemplate(); EmailMessageDTO emailMessageDTO=new EmailMessageDTO("dineshshe@gmail.com", "Hi There"); //Very long running call Boolean result=restTemplate.postForObject("http://localhost:9080/asycn/sendEmail",

问题 Can somebody explain to me why my error is not thrown in my first example? And why it is when I use process.nextTick() ? var deferred = require('deferred'); // This code does not work. // Error seems to never been thrown and script kind of freeze without saying anything. deferred.resolve().then(function(){ console.log('deferred resolved'); throw new Error('Synchronous error thrown in deferred.then()'); }); // This code does work. // I just embedded the throw in the process.nextTick() method.

问题 struggling to get promises working correctly in angularjs service provider i've read the docs as well as numerous examples (here, here and here) and i think i've got my syntax ok (although obviously something is wrong) app module and controller look like var myApp = angular.module('myApp', []); myApp.controller('Controller_1', ['$scope', 'Service_1', function($scope, Service_1) { var myName = "Ben"; Service_1.slowService(myName) .then(Service_1.fastService(name)); $scope.myName = myName; }]);

问题 EDIT thx to all the answers, and finally I decide to use some tools like Step, all I need is "flow control" and don't want any thing else which may slow down the performance (I don't know how much exactly it would effect or the effect just can be ignored). So I just create a little tool for flow control: line.js /** * Create the "next" function * * @param {Array} tasks * @param {Number} index * @param {Number} last */ var next = function(tasks, index, last) { if (index == last) { return tasks

问题 I use App Engine Flexible Environment (previously called Managed VMs), and recently upgraded to the latest gcloud SDK. It included some new errors: ERROR: (gcloud.preview.app.deploy) Error Response: [400] Invalid character in filename: lib/setuptools/script (dev).tmpl ERROR: The [application] field is specified in file [.../app.yaml]. This field is not used by gcloud and must be removed. Project name should instead be specified either by `gcloud config set project MY_PROJECT` or by setting

问题 I have the following at the bottom of my HTML: <script defer="defer" src="http://localhost:8080/bower_components/jquery/dist/jquery.min.js"></script> <script defer="defer" src="http://localhost:8080/bower_components/bootstrap/dist/js/bootstrap.min.js"></script> <script defer="defer" src="http://localhost:8080/apps/promotion/active.js"> // "Gulped" angular, ngAnimate, ui.bootstrap, and my angular app; in that order. </script> </body> </html> At random times, I will get this error when I

问题 I am performing multiple batched asynchronous operations in my code. Although operations within a batch should execute asynchronously batches should be executed synchronously one after another. Here is a jsfiddle I created. Look at the console as all output is there. And here is the code for convenience: asyncChain(10, 'FIRST CHAIN') .then(function () { asyncChain(10, 'SECOND CHAIN'); }) .then(function(){ asyncChain(10, 'THIRD CHAIN'); }); function asyncChain(n, msg) { var promiseChain = Q

问题 Let say I chained the $.Deferred like this. $.each(data, function(k, v) { promise.then(function() { return $.post(...); }).then(function(data) { if(data)... // here is the conditions return $.post(...); }).then(function(data) { if(data)... // here is another condition return $.post(...); }) }); promise.done(function() { console.log("All Done!"); }); Am I doing it right? how do I prevent the next chain to execute if the condition return false, and where do I do this: if(data){ console.log(