I’m new to Promises and async/await programming and I am not sure I am getting it straight. I am creating an API in Nodejs, with Express, Mongoose and MongoDB. I have seen a lot of tutorials on how to deal with asynchronicity but all of them are about NodeJs projects where the routing and the DB query a…
Tag: async-await
Are javascript’s async functions actually synchronous?
I am trying to figure out how does asynchronous code work in Javascript. Now, I understand that there is actually one single thread in JS that executes jobs in a queue, and it can only start executing the next job if the current one is completed (i.e. if all of the sync code or an async function is completed)…
Change Woocommerce API functions to async/await using NodeJS in AWS Lambda
I am looking to change a couple of Woocommerce API calls so each function finishes before the next functions proceeds. However, I am unsure how to do this without breaking the specific Node Woocommerce API code. https://woocommerce.github.io/woocommerce-rest-api-docs/?javascript#create-an-order-note How can I…
Where to place async/await in this case?
EDIT: The problem was not the placement of the async/await per se, but the fact that I was trying to make a constructor asynchronous. I have looked through docs, read other questions and answers, but I still can’t get my head wrapped around what function to make async, and where to place the await, to g…
Why do I lose stack trace when using async-await in Node.js?
When I run the following program I get the following output which prints the stack through the various invoked functions However when the error is thrown after the await call in the following program This is the output I’d like to understand why the stack trace is lost in the second case but not in the …
Async task manager with maximum number of concurrent “running” tasks
I am trying to implement two classes that can deal with asynchronous tasks in JavaScript: Class Task: mimics the execution of a task with setTimeout. Once the timer expires, the task is considered completed. Class TaskManager: has a capacity parameter to limit the numbers of tasks that can be executing in par…
Function lacks ending return statement and return type does not include ‘undefined’
Function lacks ending return statement and return type does not include ‘undefined’. In the following async await function I had return type of Promise: <any> but I wanted to correct that so I did the following: However that creates the error above. Where getMarkets is called: What is/are th…
Questions on performance regarding async/await vs Promises and the event loop
Introduction A colleague of mine and I have been discussing the asynchronous nature of JavaScript in the browser and wondering what technical benefits are. We are aware that async/await is syntactical sugar for Promises, but curious to know if there is any other performance benefit for using one over the othe…
JS async / await tasks queue
In my JS app I’m using the async / await feature. I would like to perform multiple API calls and would like them to be fired one after other. In other words I would like to replace this simple method: with something more complex.. like: What will be the best way to handle the asynchronous returns? Answe…
Promises returned data ”
my data which is fetched from youtube is using nodejs is – Now I want to search 5 related videos to each video my api and api to 5 related Videos is given below It is giving the output like How to solve this pending problem or how to wait so it gets full data. Answer It happens because you