Promise.allSettled | ES Proposal spec-compliant shim | Reactive Programming library
kandi X-RAY | Promise.allSettled Summary
kandi X-RAY | Promise.allSettled Summary
ES Proposal spec-compliant shim for Promise.allSettled. Invoke its "shim" method to shim Promise.allSettled if it is unavailable or noncompliant. Note: a global Promise must already exist: the es6-shim is recommended. This package implements the es-shim API interface. It works in an ES3-supported environment that has Promise available globally, and complies with the proposed spec.
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Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of Promise.allSettled
Promise.allSettled Key Features
Promise.allSettled Examples and Code Snippets
Lines of Code : 63License : Strong Copyleft (CC BY-SA 4.0)
Copyprivate processZipForExtraction(file: Image): Promise {
return new Promise((resolve, reject) => {
let writeStream = fs.createWriteStream(file.name);
readStream.pipe(writeStream);
writeStream.on('finish', () const express = require('express');
const router = express.Router();
/**
* Model importing / Collections
*/
const fish_db = require("../../db/fish_db");
const bug_db = require("../../db/bug_db");
const sea_db = require("../../db/sea_dbCommunity Discussions
Trending Discussions on Promise.allSettled
QUESTION
My idea is as follows: I want to send multiple requests simultaneously without having to wait until priors execution.
So my pseudo code looks as follows:
...ANSWER
Answered 2021-May-12 at 11:50Interesting question - the problem is that you're not actually simulating async requests. In fact your two request-methods are simply creating promises which are resolved/rejected synchronously/immediately. You would need to put await before failingRequest() in order for the rejected promise to be caught in the surrounding try/catch but this is probably not what you want.
Instead you should not "start" the promises immediately, it should rather be something like:
QUESTION
I am getting undefined values for fulfilled promises:
...ANSWER
Answered 2021-May-30 at 19:18In your callback of the first then call you dont return anything:
QUESTION
note: The issue was in not putting return on map so not related with Promise
I'm trying to to make multiple, independent api calls in parallel. Promise.allSettled() looked right for this scenario. This is my first try to ever use promise, so I might have made some obvious mistakes.
The issue: then was executed before promise resolve/reject. Things were printed in order indicated with circled numbers.
...ANSWER
Answered 2021-May-27 at 10:51It's not related to Promise.allSettled:
QUESTION
I have a test that says "After approx X concurrent connections, I should see socket hangups since my service will stop answering someone hammering me."
This works pretty well after a lot of painful trial and error, but because I am using
await Promise.all(myrequests) the first time I see a hangup it throws a socket hang up exception.
This works, but causes some error messages, since my routine for hanging up does some debug logging, and the test is over at this point.
What's the best way to say: "wait for all of these, even when they throw errors?"
My jest/supertest problem block looks something like:
...ANSWER
Answered 2021-May-25 at 06:46I don't know that Jest has something to help but there's Promise.allSettled which will wait for all promises to fulfill or reject, returning an array of all results. The rejected promises will have a .reason attached.
The main difference is that Jest will be matching error objects rather than using the thrown error matchers so some of the error specific functionality is not there.
QUESTION
I am creating a loop to create/update users using functions with built-in promises:
...ANSWER
Answered 2021-May-24 at 12:35QUESTION
I've the following codes:
http-common.ts
...ANSWER
Answered 2021-May-13 at 23:48Your second code copies the array, but it still contains the same objects, one of which is then mutated in the line
QUESTION
I am trying to create users in batches of 20. I have created the functions to do this and placed them all in an array "promises" with a counter. When the counter reaches 20 or the total number of users has been uploaded, I execute all the promises in the array. This works fine, until one of the functions returns an error, which breaks the entire code, even though it is in a loop for the total amount of users:
...ANSWER
Answered 2021-May-06 at 20:38You used Promise.allSettled() and it will resolve when each Promise in an array resolves or rejects. The Promise.allSettled() itself will never reject. That means that you can just check if some of the Promises in an array has rejected after the Promise.allSettled() resolves and in that case handle it in your business logic. You can do it like this:
QUESTION
When making multiple requests concurrently with Promise.allSettled, does the order of the array in the response correspond to the intitial array in the request? Does it maintain the same order regardless of the order in which they settle?
ANSWER
Answered 2021-Apr-26 at 21:52Yes, it is guaranteed. The steps are described in the specification.
On each iteration over the passed iterable, it does
Set resolveElement.[[Index]] to index. Set rejectElement.[[Index]] to index.
where index is the current index in the iterable being iterated over, which then gets passed to the resolver or rejector algorithm. Both the resolver and the rejector does, at the end:
Set values[index] to obj.
where values is the array of resolve values that the whole Promise.allSettled will resolve with.
The nth item in the passed iterable/array will always correspond to the nth item in the resolved array.
QUESTION
It works after the fetch, then after Promise.all() returns undefined. Same happens with Promise.allSettled().
...ANSWER
Answered 2021-Apr-23 at 03:09.console.log returns undefined, and Promises resolve to the value returned by the last .then in the Promise chain.
Here:
QUESTION
This code performs a GET request for each case id in cases. It then validates if each case is full or has an error.
ANSWER
Answered 2021-Apr-06 at 18:47The results of Promise.all/allSettled are strictly in the insertion order, therefore you should be able to simply access the source by its index:
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