async-await

问题 As best as I can, I opt for async all the way down. However, I am still stuck using ASP.NET Membership which isn't built for async. As a result my calls to methods like string[] GetRolesForUser() can't use async. In order to build roles properly I depend on data from various sources so I am using multiple tasks to fetch the data in parallel: public override string[] GetRolesForUser(string username) { ... Task.WaitAll(taskAccounts, taskContracts, taskOtherContracts, taskMoreContracts,

问题 I have created VetCreate and VetEdit functions to create a new record and then edit that record respectively (code below). The problem I have is the successful create response is returned but the newly created id isn't populated in the request to fetch the record. I have async/await keywords in place where I think they need to be but the details logged to the console clearly indicate something isn't working as it should. If I try to edit a record after returning to the list screen, the API

问题 Looking for some help with best practices on creating a potentially multi-threaded asynchronous application. This application will look through several directories for a certain pattern (configurable per directory). For all of the files it finds in that directory, it will kick off an asynchronous operation for each file (read/write, db operations, api calls, etc). The directories themselves should be processed concurrently as they are un-related to each other. It's my understanding that Task

问题 Looking for some help with best practices on creating a potentially multi-threaded asynchronous application. This application will look through several directories for a certain pattern (configurable per directory). For all of the files it finds in that directory, it will kick off an asynchronous operation for each file (read/write, db operations, api calls, etc). The directories themselves should be processed concurrently as they are un-related to each other. It's my understanding that Task

问题 Why won't the program wait for the function to return the list before going to the print statement? I think it's because I made the forEach loop async but I need it to be async to get the newSummary which is a Future. Future syncToCloud() async{ final List<Map<String,dynamic>> _events = await events(); print(_events.length); } Future<List<Map<String, dynamic>>> events() async { List<Map<String, dynamic>> maps = await db.query('data'); List<Map<String, dynamic>> newMaps=[]; maps.forEach(

问题 I'm writing a function to generate a random key using crypto.randomBytes, which takes a callback. I'd prefer to use async await so I'm trying to use util.promisify to wraprandom bytes like this: const crypto = require('crypto'); const util = require('util'); const randBytes = util.promisify(crypto.randomBytes); async function genRandKey() { bytes = await randBytes(48).catch((err) => { console.log(err); }); return bytes.toString('hex'); } let result = genRandKey(); console.log('key: ', result)

问题 Hello I am working in a user verification task using a middleware to verify if the user exist or not, this is my code: I have an endpoint defined like this: app.get("/login/", verifyUser, userController.login); This is my middleware verifyUser: function verifyUser(req, res, next) { console.log("Midd 1:", req.query); let userInfo = userController.findUserOne(req, res); console.log("userInfo:" + userInfo); next(); } This is my controller method: exports.findUserOne = function (req, res) {

问题 I am using async storage in my items listing app. The problem i am facing is that, my first item does not get stored in the async till i enter the second item. i am saving array of objects with the help of react hooks E.g if I enter items as 1)Apples 2)Bananas then only apples will get saved in the async while bananas will not be saved until i enter the third item. const [getWant, setwant] = useState([]); const saveData = async () => { AsyncStorage.clear() try { await AsyncStorage.setItem("

问题 While the functional setState() is recommended when the current state is being used, the function still cannot be async. How could we develop a function that uses the state, calls a REST API and changes the state right after? This is the original function, that disregards the async behavior of setState. onSortColumnChanged = (sortColumn) => async (event) => { const prev = this.state; ​ const searchParams = { ...prev.params, sortColumn: sortColumn }; ​ const result = await this.callSearch

问题 Introduction I am getting stuck with database Promises I am using inside the Jest testing framework. Things are running in the wrong order, and following some of my latest changes, Jest is not finishing correctly because an unknown asynchronous operation is not being handled. I am fairly new to Node/Jest. Here is what I am trying to do. I am setting up Jest inside a multiple Docker container environment to call internal APIs in order to test their JSON outputs, and to run service functions in