asynchronous

问题 I have a program which has no purpose but to help me understand how async and await works. It's a console application which parses XML and waits for a name to be returned, either the surname or the first name. Here is the code: static void Main(string[] args) { Task<string> name = GetFirstParsedName(); name.Wait(); if (name.IsCompleted) { Console.WriteLine(name.Result); } Console.ReadLine(); } static async Task<string> GetFirstParsedName() { string xmlSnippet = @"<person> <FirstName>Chamir<

问题 I have a program which has no purpose but to help me understand how async and await works. It's a console application which parses XML and waits for a name to be returned, either the surname or the first name. Here is the code: static void Main(string[] args) { Task<string> name = GetFirstParsedName(); name.Wait(); if (name.IsCompleted) { Console.WriteLine(name.Result); } Console.ReadLine(); } static async Task<string> GetFirstParsedName() { string xmlSnippet = @"<person> <FirstName>Chamir<

问题 I want to use both ThreadPoolExecutor from concurrent.futures and async functions. My program repeatedly submits a function with different input values to a thread pool. The final sequence of tasks that are executed in that larger function can be in any order, and I don't care about the return value, just that they execute at some point in the future. So I tried to do this async def startLoop(): while 1: for item in clients: arrayOfFutures.append(await config.threadPool.submit(threadWork, obj

问题 I want to use both ThreadPoolExecutor from concurrent.futures and async functions. My program repeatedly submits a function with different input values to a thread pool. The final sequence of tasks that are executed in that larger function can be in any order, and I don't care about the return value, just that they execute at some point in the future. So I tried to do this async def startLoop(): while 1: for item in clients: arrayOfFutures.append(await config.threadPool.submit(threadWork, obj

问题 How can I skip a function if the executing time too long. For example I have 3 functions : function A(){ Do something.. .. } function B(){ Do something.. .. } function C(){ Do something.. .. } A(); B(); C(); So for example for some reason function B have infinity loop inside, and keep running. How can I skip function B and go to function C if function B executing too long ? I tried this but seem not working : try { const setTimer = setTimeOut({ throw new Error("Time out!"); },500); B();

问题 How can I skip a function if the executing time too long. For example I have 3 functions : function A(){ Do something.. .. } function B(){ Do something.. .. } function C(){ Do something.. .. } A(); B(); C(); So for example for some reason function B have infinity loop inside, and keep running. How can I skip function B and go to function C if function B executing too long ? I tried this but seem not working : try { const setTimer = setTimeOut({ throw new Error("Time out!"); },500); B();

问题 I am looking for a wait to stop (send an exception) to a running promise on SIGINT . The examples given in the doc exit the whole process and not just one worker. Does someone know how to "kill", "unschedule", "stop" a running thread ? This is for a p6-jupyter-kernel issue or this REPL issue. Current solution is restarting the repl but not killing the blocked thread await Promise.anyof( start { ENTER $running = True; LEAVE $running = False; CATCH { say $_; reset; } $output := self.repl-eval(

问题 I am looking for a wait to stop (send an exception) to a running promise on SIGINT . The examples given in the doc exit the whole process and not just one worker. Does someone know how to "kill", "unschedule", "stop" a running thread ? This is for a p6-jupyter-kernel issue or this REPL issue. Current solution is restarting the repl but not killing the blocked thread await Promise.anyof( start { ENTER $running = True; LEAVE $running = False; CATCH { say $_; reset; } $output := self.repl-eval(

问题 If you do an asynchronous action that updates the state in componentWillMount (like the docs say), but the component is unmounted (the user navigates away) before that async call is complete, you end up with the async callback trying to set the state on a now unmounted component, and an "Invariant Violation: replaceState(...): Can only update a mounted or mounting component." error. What's the best way around this? Thanks. 回答1: update 2016 Don't start using isMounted because it will be

问题 In my ASP.NET MVC 3 project I'm calling a web service for login authentication. But it throws an exception: Exception Details: An asynchronous operation cannot be started at this time. Asynchronous operations may only be started within an asynchronous handler or module or during certain events in the Page lifecycle. If this exception occurred while executing a Page, ensure that the Page is marked <%@ Page Async="true" %>. How to fix this issue? 回答1: Make sure that your Controller method