promisify | Convert callback-based APIs to promises | Reactive Programming library
kandi X-RAY | promisify Summary
kandi X-RAY | promisify Summary
Promises are a popular solution to some of the drawbacks of the callback-style async APIs dominant in node.js libraries. But it's awkward to write an node.js application using promises when all the libraries you want to use are callback-based.
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Top functions reviewed by kandi - BETA
- Produces a transformer that takes a promised function returning a promise .
- Produces a transformer that takes a promised function returning a Promise .
- Produces a PStream and returns a Promise
- Produces a transformer that takes an object and returns a transformer function
- Producer for transforming value
- Produces a promise that takes a callback function and converts it to a callback function .
- Merge object properties from one object into another .
- Produces a promisified version of a value .
- Append items to an array - like object
- creates an identity matrix if x is not an identity
promisify Key Features
promisify Examples and Code Snippets
Lines of Code : 29License : Strong Copyleft (CC BY-SA 4.0)
Copyconst { promisify } = require('util');
const verify = promisify(jwt.verify);
// resolves if jwt cookie verifies and user found
// rejects if jwt cookie is missing or doesn't verify or user not found
async function isLoggedIn(req) {
coclient.set('foo', 'bar', (err, reply) => {
if (err) throw err;
console.log(reply);
client.get('foo', (err, reply) => {
if (err) throw err;
console.log(reply);
});
});
const rconst fx = require("money");
const { promisify } = require("util");
const oxr = require("open-exchange-rates");
const oxrLatestPromisify = promisify(oxr.latest);
oxr.set({ app_id: "your_app_id" });
async function convertToAnotherCurrenc// promisify this function so it returns a promise that resolves/rejects
// when it is complete and resolves with the asynchronously retrieved value
searchUserUsedPromo: (userId, promoCode) => {
return new Promise((resolve, reject) const Jimp = require('jimp');
const { promisify } = require('util');
const MIME_TYPE = 'image/png';
const IMAGE_URL = `data:${MIME_TYPE};base64,iVBORw0KGgoAAAANSUhEUgAAAGQAAABkCAIAAAD/gAIDAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwimport { promisify } from "util";
import { readdir as readdirWithCallback } from "fs";
const readdir = promisify(readdirWithCallback);
async public getImageFile(imageFileName: string): Promise {
const directoryPath = path.join(__dirnameconst { promisify } = require('util');
const query = promisify(db.query).bind(db);
const get_map = async () => {
try {
const result = await query('SELECT game,game2 FROM battles WHERE player1=? OR player2=?',[result.char,const redis = require('redis');
const Q = require('q');
class CachePool {
constructor() {
this.cachedClients = {};
this.pendingCachedClients = {};
}
getConnection(host, port) {
const deferred = Q.deferconst { GraphQLUpload } = require('graphql-upload');
const server = new ApolloServer({
resolvers: {
Upload: GraphQLUpload,
}
})
// this is a utility function to promisify the stream and store the image in "use strict"; // generateURLs as a module
const util = require('util');
const fs = require('fs');
// Use promisify to convert callback methods to promise returning
const glob = util.promisify( require("glob"));
const readdir = util.promiCommunity Discussions
Trending Discussions on promisify
QUESTION
I have a Mongoose model like this:
...ANSWER
Answered 2022-Mar-30 at 15:18As far as I understand, you are just looping through the candidates array but you are not storing the updated array. You need to store the updated data in a variable as well. Please give it a try with the solution below using map.
QUESTION
When using a form to upload some files I can see in dev tools in the network inspector and specifically in the payload tab under form data, in view source.
Note the below includes the file name including the path twoItems/Screenshot... its this path twoItems I need to access in the API but can't.
Security? Err why do I want this? It's for a document management app, users cant be creating folders in the browser and then add the files. They need to drag and drop nested directories of files.
...ANSWER
Answered 2022-Mar-12 at 18:09You need to set the busboy's option:
QUESTION
I am working on Discord.TS bot but when I launch it with ts-node src/index.ts, I see the error
ANSWER
Answered 2022-Feb-09 at 10:45This error is because you are targeting a JavaScript version that isn't supported by your installed Node.js version. You can either change the JavaScript version you are targeting, or update your Node.js version.
Option 1: Updating Node.js VersionMake sure you have installed at least Node.js version 16.11.0 (according to node.green this is the first version to fully support instance class fields).
You can check your node version by typing node -v in your terminal.
QUESTION
Okay guys so after I posted the first question and got no answer, I almost surfed the whole net, formatted the code but still couldn't find a fix.
I keep getting this error when I register about 13-14 slash commands using the commands.set() method:
ANSWER
Answered 2022-Jan-26 at 12:20What the error is trying to tell you is that you can't have required options after non-required ones. In your requestData you can see all your options arrays. Check out the one for your timeout command:
QUESTION
I'm new to using Discord.js, and after looking through the basic guide/docs, I'm still somehow confused as to how to allow event and/or command files to access the main client instance. For example, I may want to call client.database within an event file in order to make use of CRUD operations.
I did some digging on my own, and I saw that someone had implemented this by getting rid of the .execute function in each of the event files, and passing in event.bind(null, client) to client.on(). I don't really understand it though:
https://github.com/KSJaay/Alita/blob/fe2faf3c684227e29fdef228adaae2ee1c87065b/Alita.js https://github.com/KSJaay/Alita/blob/master/Events/guildMemberRemove.js
My Main File:
...ANSWER
Answered 2022-Jan-21 at 18:41Get the client using .client on an object, an Interaction in this case
QUESTION
I am attempting to util.promisify the bonjour npm package. This is the original use case described in the docs:
ANSWER
Answered 2022-Jan-07 at 22:21That's because the bonjour callback does not comply with the Node.js callback signature (err, data) => {}. Indeed, bonjour.find's callback has the success value as first parameter. You could wrap it in a proxy function like this:
QUESTION
I'm using Shopify's Node Api tutorial to create a Redis store. However, the code block provided is in typescript and my entire project is written in javascript (React/nextjs). I've been working for a few hours to try and convert the code to be useable, but am unable to get it to work properly in my project. Seriously struggling with this.
How would I convert the below code block from typescript to javascript?
...ANSWER
Answered 2022-Jan-06 at 17:12You basically need to get rid of all the types (Session and string) and switch private to #, maybe something like this:
QUESTION
I was following this video and when I try to create a react application on my system by using the following command
...ANSWER
Answered 2021-Dec-08 at 07:51The problem seems to be that of an inappropriate installation. The go to way to fix this would be to ensure a proper uninstall of node and npm. Please follow the steps mentioned here.
Once properly uninstalled, head over to install node and proceed with the re-installation.
QUESTION
I am new to Bubblewrap. I downloaded Node.js and then did npm i -g @bubblewrap/cli. It threw some warnings, but it did finish.
After this, when I am doing bubblewrap init --manifest https://beegle.app/bpro-manifest.json, I am getting some errors which I don't understand and don't know how to solve.
Here are the error messages:
...ANSWER
Answered 2021-Dec-07 at 00:57It looks like I had old version of Node.js installed and for whatever reason, even though I had just downloaded Node.js from the website, the latest one was not loaded or it was not loaded at the correct place or whatever.
So basically warnings thrown by npm i -g @bubblewrap/cli were indeed strong ones and it had not completed its job.
I upgraded to the latest Node.js version with nvm install node --reinstall-packages-from=node and now the errors that I posted have gone in the bubblewrap init action.
Of course, as is the case with all development things, now I face the new errors and warnings.
QUESTION
As it is stated in the documentation of Puppeteer, the basic usage of "dialog" event is the following:
...ANSWER
Answered 2021-Nov-25 at 02:07This answer is a variant of Puppeteer not picking up dialog box. A quick summary of that answer: .on handlers can be promisified to make it easy to integrate waiting for them into control flow without a mess of callbacks. An important nuance that seems lost in OP's code is that if you're only waiting once, use .once rather than .on, or use .off to remove the listener. After it's been resolved, the listener becomes stale.
In this case, let's say you have a bunch of URLs to pages that show confirmation dialogs (or you inject your own confirmation dialog), and for each URL, you want to add a handler for the dialog that lets you accept or dismiss it based on a condition. You might also want to collect the message from the dialog, which is shown below.
Here's a simple example of this:
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