I am new to asynchronous programming with the async modifier. I am trying to figure out how to make sure that my Main method of a console application actually runs asynchronously. class Program { static void Main(string[] args) { Bootstrapper bs = new Bootstrapper(); var list = bs.GetList(); } } public class Bootstrapper { public … Read more
This question already has answers here: How to return the response from an asynchronous call (43 answers) Closed 7 years ago. This question is asked many times in SO. But still I can’t get stuff. I want to get some value from callback. Look at the script below for clarification. function foo(address){ // google map … Read more
Closed. This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be answered with facts and citations by editing this post. Closed 8 years ago. Improve this question I have heard lots of raving about Akka framework (Java/Scala service platform), but so far have … Read more
Under what scenarios would one want to use public async Task AsyncMethod(int num) instead of public async void AsyncMethod(int num) The only scenario that I can think of is if you need the task to be able to track its progress. Additionally, in the following method, are the async and await keywords unnecessary? public static … Read more
I am learning about async/await, and ran into a situation where I need to call an async method synchronously. How can I do that? Async method: public async Task<Customers> GetCustomers() { return await Service.GetCustomersAsync(); } Normal usage: public async void GetCustomers() { customerList = await GetCustomers(); } I’ve tried using the following: Task<Customer> task = … Read more
As far as I understand, in ES7/ES2016 putting multiple await‘s in code will work similar to chaining .then() with promises, meaning that they will execute one after the other rather than in parallel. So, for example, we have this code: await someCall(); await anotherCall(); Do I understand it correctly that anotherCall() will be called only … Read more
According to the docs, “Without middleware, Redux store only supports synchronous data flow”. I don’t understand why this is the case. Why can’t the container component call the async API, and then dispatch the actions? For example, imagine a simple UI: a field and a button. When user pushes the button, the field gets populated … Read more
Given the following examples, why is outerScopeVar undefined in all cases? var outerScopeVar; var img = document.createElement(‘img’); img.onload = function() { outerScopeVar = this.width; }; img.src=”https://stackoverflow.com/questions/23667086/lolcat.png”; alert(outerScopeVar); var outerScopeVar; setTimeout(function() { outerScopeVar=”Hello Asynchronous World!”; }, 0); alert(outerScopeVar); // Example using some jQuery var outerScopeVar; $.post(‘loldog’, function(response) { outerScopeVar = response; }); alert(outerScopeVar); // Node.js example … Read more
I have a JavaScript widget which provides standard extension points. One of them is the beforecreate function. It should return false to prevent an item from being created. I’ve added an Ajax call into this function using jQuery: beforecreate: function (node, targetNode, type, to) { jQuery.get(‘http://example.com/catalog/create/’ + targetNode.id + ‘?name=” + encode(to.inp[0].value), function (result) { … Read more
From my understanding one of the main things that async and await do is to make code easy to write and read – but is using them equal to spawning background threads to perform long duration logic? I’m currently trying out the most basic example. I’ve added some comments inline. Can you clarify it for … Read more