Have a look at CountDownLatch. You can emulate the desired synchronous behaviour with something like this: private CountDownLatch doneSignal = new CountDownLatch(1); void main() throws InterruptedException{ asyncDoSomething(); //wait until doneSignal.countDown() is called doneSignal.await(); } void onFinishDoSomething(){ //do something … //then signal the end of work doneSignal.countDown(); } You can also achieve the same behaviour using … Read more
You want something like this. I haven’t tested it, but hopefully you should get the idea. var dates = []; //<– Contains a list of dates for the coming week var baseUrl = “http://www.someserver.com”; var storedChannels = [1,2,3,4,5,6,7,8,9,10,45,23,56,34,23,67,23,567,234,67,345,465,67,34]; function ProcessNext(ch, d) { if (d < 7) { d++; } else { d=0; if (ch < … Read more
The Boost.Asio documentation really does a fantastic job explaining the two concepts. As Ralf mentioned, Chris also has a great blog describing asynchronous concepts. The parking meter example explaining how timeouts work is particularly interesting, as is the bind illustrated example. First, consider a synchronous connect operation: The control flow is fairly straightforward here, your … Read more
The callback passed to a Promise constructor is always called synchronously, but the callbacks passed into then are always called asynchronously (you could use setTimeout with a delay of 0 in a userland implementation to achieve that). Simplifying your example (and giving the anonymous function’s names so I can refer to them) to: Promise.resolve().then(function callbackA … Read more
From jQuery.ajax() async Boolean Default: true By default, all requests are sent asynchronously (i.e. this is set to true by default). If you need synchronous requests, set this option to false. So in your request, you must do async: false instead of async: “false”. Update: The return value of ajaxSubmit is not the return value … Read more
Node.js runs on a single thread whilst scripting languages use multiple threads. Not technically. Node.js uses several threads, but only one execution thread. The background threads are for dealing with IO to make all of the asynchronous goodness work. Dealing with threads efficiently is a royal pain, so the next best option is to run … Read more
When you execute something synchronously, you wait for it to finish before moving on to another task. When you execute something asynchronously, you can move on to another task before it finishes. In the context of operating systems, this corresponds to executing a process or task on a “thread.” A thread is a series of … Read more
Like Obama would say: YES YOU CAN ! jQuery .ajax() Setting async = false within the .ajax() handler will do the trick.
jQuery cannot make synchronous animations. Remember that JavaScript runs on the browser’s UI thread. If you make a synchronous animation, the browser will freeze until the animation finishes. Why do you need to do this? You should probably use jQuery’s callback parameter and continue your method code in the callback, like this: function doSomething() { … Read more
ES 6 (Node 8+) You can utilize async/await await operator pauses the execution of asynchronous function until the Promise is resolved and returns the value. This way your code will work in synchronous way: const query = MySchema.findOne({ name: /tester/gi }); const userData = await query.exec(); console.log(userData) Older Solution – June 2013 😉 Now the … Read more