What you are really asking is how to implement a function after a promise is done. If so, then making the function an Async function will do the trick. For information on async-await check out Async/await. 2 solved Async-Await or Promises with JavaScript functions [closed]
Taking a guess here but it looks like you want to promis-ify the Voice.onSpeechResults callback. Have your MicButton function return a promise that resolves with the result you want export const MicButton = () => new Promise((resolve, reject) => { Voice.start(‘en-US’) Voice.onSpeechResults = (res) => { resolve(res.value[0]) } Voice.onSpeechError = reject }).finally(() => { Voice.removeAllListeners() … Read more
I mean opA is a function, so why not opA()? Because opA is a reference to the function itself. The promise will use that reference to execute that function at a later time. Alternatively, opA() executes the function (without any arguments) now and passes the result of that function call to the promise. Since your … Read more
When the compiler encounters await keyword it will automatically schedule a task in task scheduler. The operation waits (in a non-blocking manner) for the task to complete before continue to do the rest of the code block. To make your code run in parallel you need to modify it into public async Task GetDistance() { … Read more
What you should do is to create a state that will contain the data from database, and you need to fill the state when “componentDidMount” or “useEffect” if you are using react Hooks. react documentation of componentDidMount: React componentDidMount short example of what I meant: import React, {useEffect, useState} from ‘react’ const exampleApp = ()=>{ … Read more
You’re comparing apples and oranges. Each of the approaches you list has benefits and drawbacks, so it’s impossible to answer which is the “preferred way.” Likewise, many of these examples will return immediately because they use deferred execution, so they’ll technically run faster, but won’t actually make your program run any faster. But if you’re … Read more
First I would explain that nobody should ever rely on precise timing between two separate promise chains. They run independently of one another and as soon as you insert any real world asynchronous operations in either of those promise chains (which all real-world programming would contain), then the timing of each chain is entirely unpredictable … Read more
You need to mark your action as async just like you would any method, for example: Action action = async delegate() //snip However, this is equivalent to an async void method which is not recommended. Instead you many consider using Func<Task> instead of action: Func<Task> doStuff = async delegate() { using (var client = new … Read more
your code is not triggering event by clicking, and you should pass argument result in resolve let onlyBtn = document.getElementById(“onlyButton”); let result; async function realMain() { await step().then((res) => { console.log(res); }); } async function step() { return new Promise((resolve) => { onlyBtn.addEventListener(“click”, function () { result = “nice”; resolve(result); }); }); } realMain(); <div> … Read more
The reason your code doesn’t work is that you never call the async function you’ve created. However, there isn’t any reason to make an inner async function; just make the one you already have async: export const setSearchField = text => async (dispatch) => { dispatch({ type: REQUEST_GIFS_PENDING }); try { const response = await … Read more
You can make Main() method async as well and use WhenAll instead of WaitAll. And use just T() when assign Task to array item, there is no need to do it like that new Task(async () => await T()); static async Task Main() { var tasks = new Task<bool>[10]; for (int i = 0; i … Read more
Introduction If you are looking for a way to run multiple tasks and get the results after all of them have ended, then you have come to the right place. In this article, we will discuss how to run many tasks and get their result after all of them have ended. We will discuss the … Read more
How does async-await allow for responsiveness in an application that uses an event loop, such as Windows Forms? [closed] solved How does async-await allow for responsiveness in an application that uses an event loop, such as Windows Forms? [closed]
an async function without an await expression will run synchronously. If there is an await expression inside the function body, however, the async function will always complete asynchronously. Yes, everything in the async function will run synchronously until await is encountered. Examples: async function withoutAwait() { console.log(‘without await’) } async function withAwait() { await 0 … Read more
Return a promise from your config.js file. mongodb client supports promises directly, just do not pass the callback parameter and use then. config.js module.exports = (app) => { const mongo_client = require(‘mongodb’).MongoClient; const assert = require(‘assert’); const url=”mongodb://localhost:27017″; const db_name=”portfolio”; return mongo_client.connect(url).then(client => { assert.equal(null, err); console.log(‘Connection Successfully to Mongo’); return client.db(db_name); }); }; And … Read more