async-await

问题 What happens in C# when awaitable task is finished but the thread in which async method had been started is unavailable (handles another request for example) ? Will then be used another thread instead of the first one, or execution will wait until the busy thread is available ? Thanks in advance for your answers. 回答1: That depends on the SynchronizationContext of the thread on which the continuation was scheduled. For example, when you're using async/await in an app with a UI thread, like an

问题 What happens in C# when awaitable task is finished but the thread in which async method had been started is unavailable (handles another request for example) ? Will then be used another thread instead of the first one, or execution will wait until the busy thread is available ? Thanks in advance for your answers. 回答1: That depends on the SynchronizationContext of the thread on which the continuation was scheduled. For example, when you're using async/await in an app with a UI thread, like an

问题 What happens in C# when awaitable task is finished but the thread in which async method had been started is unavailable (handles another request for example) ? Will then be used another thread instead of the first one, or execution will wait until the busy thread is available ? Thanks in advance for your answers. 回答1: That depends on the SynchronizationContext of the thread on which the continuation was scheduled. For example, when you're using async/await in an app with a UI thread, like an

问题 What happens in C# when awaitable task is finished but the thread in which async method had been started is unavailable (handles another request for example) ? Will then be used another thread instead of the first one, or execution will wait until the busy thread is available ? Thanks in advance for your answers. 回答1: That depends on the SynchronizationContext of the thread on which the continuation was scheduled. For example, when you're using async/await in an app with a UI thread, like an

问题 This question already has answers here : ConfigureAwait(true) not returning on the context it was awaited on (2 answers) Closed last month . I was expecting to get back to Thread#1 at location 1.2, but I did not. Is there a way to get back to UI thread after making the async call? Thanks Also I cannot make the top level method async. Not sure if async all the way will solve this issue but I don't have that choice right now. class Program { static void Main(string[] args) { ComputeThenUpdateUI

问题 This question already has answers here : ConfigureAwait(true) not returning on the context it was awaited on (2 answers) Closed last month . I was expecting to get back to Thread#1 at location 1.2, but I did not. Is there a way to get back to UI thread after making the async call? Thanks Also I cannot make the top level method async. Not sure if async all the way will solve this issue but I don't have that choice right now. class Program { static void Main(string[] args) { ComputeThenUpdateUI

问题 This question already has answers here : ConfigureAwait(true) not returning on the context it was awaited on (2 answers) Closed last month . I was expecting to get back to Thread#1 at location 1.2, but I did not. Is there a way to get back to UI thread after making the async call? Thanks Also I cannot make the top level method async. Not sure if async all the way will solve this issue but I don't have that choice right now. class Program { static void Main(string[] args) { ComputeThenUpdateUI

问题 I am working on a react chap app that pulls data from a firebase database. In my "Dashboard" component I have an useEffect hook checking for an authenticated user and if so, pull data from firebase and set the state of a an email variable and chats variable. I use abortController for my useEffect cleanup, however whenever I first log out and log back in I get a memory leak warning. index.js:1375 Warning: Can't perform a React state update on an unmounted component. This is a no-op, but it

问题 Normally, I mock my repo like so: var repository = new Mock<ISRepository>(); repository.Setup(r => r.GetMemberAsync(email)) .Returns(Task.FromResult(new Member { FirstName = firstName, LastName = lastName })); But, in my code, I check to see if the member is not found, i.e. GetMemberAsync returns null. How do I mock this? I tried: var repository = new Mock<ISRepository>(); repository.Setup(r => r.GetMemberAsync(email)) .Returns(Task.FromResult<object>(null)); but I get a compile error. 回答1:

问题 I need to repeat async/await block several times, but cannot use the following code: for (let i = 0; i <= 10; i += 1) { const res = await DoSomething(); } because it contradicts with no-await-in-loop rule. 回答1: Use Promise.all if order of iteration doesn't matter If you don't mind code running out-of-order (meaning order of each iteration doesn't matter), just use Promise.all instead: const promises = []; for (let i = 0; i <= 10; i += 1) { promises.push(DoSomething()); } const responses =