All Questions
4,246
questions
-1
votes
0
answers
68
views
Promise.All() executing but resolving Promises immediately without waiting for responses
I am trying to execute some tasks in parallel (literally, spread over multiple threads and CPU cores) via firing them off using Promise.All(), which then calls a function that sets them off to work ...
-3
votes
0
answers
80
views
Does this specific pattern synchronize the specified awaited asynchronous calls? [duplicate]
Does this specific pattern synchronize the specified part of this function? Synchronization can be implemented variously; however, I would like to know if this specific pattern accomplishes ...
- 319
0
votes
2
answers
81
views
Calling .then within a new Promise() javascript [duplicate]
I've learned javascript async/await before learning promise.then() syntax, and I am now attempting to go back and learn promise.then().
I currently have the following code
let getDatabaseData = async (...
- 11
-1
votes
1
answer
39
views
how to collect returned results of promises
as shown in the below posted code, for the array geoTIFFsFileNames it contains five files' names. for the number of items in the latter array, i want to invoke the webservice
WSGeoTIFFAsBlobStreamer, ...
- 33
-2
votes
1
answer
39
views
await does not suspend the execution till it finishes [closed]
for the below posted code, despite i am using await before Promise.all, the execution of the code does not wait till await Promise.all finishes first.
what happens is, the code that contains:
.then(...
- 33
0
votes
0
answers
26
views
Can I use promises to speed up a computational process so that I can create parallelism in it? [duplicate]
I have intense CPU consuming computations that need to be done and then written to file. I know that I can use promises to create parallelism in writing and reading files, since it is an I/O operation....
0
votes
2
answers
32
views
How to return data in SOAP from Promise
I created a SOAP server in Node.js
const soap = require('soap');
const http = require('http');
const XMLWriter = require('xml-writer');
const service = {
ImpDispatcherService: {
...
- 58.1k
1
vote
1
answer
56
views
Turn not awaited unhandled erroneous promise into warning @ processTicksAndRejections (created by throw error in "then")
there is no await on top-level allowed and my expectation was that the error thrown below would be logged as warning only but it turns out to be a blocker for completion, i.e. upon statement await ...
- 53
0
votes
3
answers
105
views
javascript MySQL - using Promise-await-async constructs, can't get code to wait for query completion
I've tried multiple versions of example code but can never seem to get something that guarantees completion of the query set before other code commences. I was under the impression that 'await' makes ...
- 31
0
votes
0
answers
30
views
NodeJS - Best Practice to process a huge text file and for each row, fire off an API requests, and write an output file (See Example Below)
I am new to concept of "promises" and seeking an enterprise grade or best practice to process a huge text file (1GB max) in NodeJS and then use each row to fire off an API request. The goal ...
- 13
1
vote
3
answers
74
views
Why do we get an uncaught error, when a promise is rejected before the rejection handler is locked in?
I am trying to catch the rejection reason of an already rejected promise, but I am getting an uncaught error.
I have spent some time studying promises, but still do not understand why the error occurs....
- 7,481
2
votes
2
answers
111
views
Do callbacks from I/O operations that return promises go to the I/O queue or the microtask queue in Node?
I'm just learning the details of how the event loop in Node works.
I learned that the promise queue takes priority over the timer queue, which takes priority over the I/O queue.
async function ...
- 21
2
votes
1
answer
50
views
I have no idea why setTimeout wrapping promise not working as i expected
I have this code.
const testArray = [1, 2, 3, 4, 5];
const test = async () => {
return Promise.resolve().then(() => {
console.log("Testing console log: ", new Date());
});
};...
- 513
1
vote
1
answer
56
views
populate my throw object with error message in json response
I want to populate my error object {'status': response.status, 'msg': ''} with the error message present in the JSON Response of the API if there is any, otherwise throw the error object without any ...
- 39
-1
votes
1
answer
50
views
JavaScript Promise handlers schedule behaviour
Given this Promise chain.
function getData() {
return new Promise((resolve) => {
// ...
})
.then((data) => data.someData)
.then((rawData) => processData(rawData))
.catch((...
- 61