async-await

问题 I am trying to automate a workflow in which I have a list of files from a directory and I put them in an array. Then for each file in array I call a function for Chrome automation. const path = require('path'); const chalk = require('chalk'); const puppeteer = require('puppeteer'); module.exports = { generateOutput : async(fileName, url = "https://example.com/") => { const filePath = path.join(process.cwd(), fileName); const outputFilePath = path.join(process.cwd(), "OutputFiles"); try{ const

问题 So, this works ALMOST as intended. I have the bot private messaging the user who uses the correct command in the correct channel of the server. Instead of clogging up the server with profile creation messages, I have the bot do profile creation privately. I know/think the problem is with the message.channel.awaitMessages, because it only sees the replies in the original channel on the server where the command was put into place. I am not sure what I should replace the message.channel

问题 I have 100s of multiple big files to download from web in my windows service - c#. The requirement is to maintain at one time - max 4 parallel web file downloads. Can I achieve concurrent/parallel downloads using async await or do I have to use BackgroundWorker process or threads ? Is async-await multithreaded ? See my sample Program using async-await below: static int i = 0; Timer_tick() { while(i < 4) { i++; model = GetNextModel(); await Download(model); } } private async Download(XYZ model

问题 I have this weird problem. I need to invoke a process from within a background worker Private Shared _process As Process Private Shared _StartInfo As ProcessStartInfo Private WithEvents _bwConvertMedia As New BackgroundWorker Here is the work in DoWorkAsync Private Async Sub _bwConvertMedia_DoWorkAsync(ByVal sender As Object, ByVal e As System.ComponentModel.DoWorkEventArgs) Handles _bwConvertMedia.DoWork For AI = 1 To 100 _StartInfo = New ProcessStartInfo(".\mycmd.exe", "-1") _StartInfo

问题 I have such a code: it('should go to summary page without sending the order', async () => { stepExecutor.startTimer(); // redirects, rather than checking logging await stepExecutor.executeStep(loginWithCustomer, { name: 'loginWithCustomer', description: 'Page: login' }); // await stepExecutor.executeStep(selectFirstSubscription, { name: 'selectFirstSubscription', description: 'Page: abo first' }); }); async function loginWithCustomer() { const page = createLoginPage(browser.params.space);

问题 There is an async function ( send ) in which if the msg attribute is not defined, another function ( getNextProcess ) sets its value. getNextProcess performs a database query within a Promise. The query callback the Promise resolve function. Problem: After translating the code with Babel, msg will always be 'undefined'. Promise runs in the background independently and returns with the correct value (checked with console log). /* ORIGINAL */ class MyClass(){ /* construct & other codes here...

问题 I have methods that benefit each other and I want one of them to start after the other, but it doesn't work exactly the way I want it. In another question, I used async and await in a normal method, but I did not manage to use google APIS and nested functions. async componentDidMount() { await this.getCityList(); console.log(this.state.cities) await this.currentLocation(); await this.getVenueInformation(); } At this point, the first function works correctly and after passing the required ones

问题 I have methods that benefit each other and I want one of them to start after the other, but it doesn't work exactly the way I want it. In another question, I used async and await in a normal method, but I did not manage to use google APIS and nested functions. async componentDidMount() { await this.getCityList(); console.log(this.state.cities) await this.currentLocation(); await this.getVenueInformation(); } At this point, the first function works correctly and after passing the required ones

问题 I learnt how to use promises in a browser but when I want to use it in my node.js it throw error. var _ref = _asyncToGenerator( /*#__PURE__*/regeneratorRuntime.mark(function _callee(url) { ^ ReferenceError: regeneratorRuntime is not defined node version v10.4.1 I use babel for export and import syntax with settings like here in starting file require('babel-register')({ presets: [ 'env' ] }) 回答1: babel-polyfill is required. You must also install it in order to get async/await working. Here

问题 I'm currently working on an Electron.js app and I'm stuck on an asynchrony problem. I have three function (downdloadFile()) inside three if statements to be executed in sequence but they run asynchronously; I already tried using async/await but it didn't worked. Here's my code: ipcMain.on('play',(event,payload) => { launcherConfig.savedRam = payload.savedRam; launcherConfig.savedMaxPermSize = payload.savedMaxPermSize; if(payload.selectedPacket) { //FIRST IF if (!fs.existsSync(launcherDir + "\