Sep 13, 2016 · A promise in Javascript is an object which represent the eventual completion or failure of an asynchronous operation. Promises represent a proxy for a value which are getting in some point …

It's supposed to return the array of results, but obviously due to the asynchronous nature of the query (hence the promises), the function returns before the results, leaving me with an undefined array. …

Feb 10, 2016 · This might seem a silly question but I am a newbie in this topic. I am working with Promises on Nodejs and I want to pass a parameter to a Promise function. However I could not …

Sep 14, 2019 · The only drawback from having a mix of promises and async functions might be readability and maintainability of the code, but you can certainly use the return value of async …

This is not a realworld problem, I'm just trying to understand how promises are created. I need to understand how to make a promise for a function that returns nothing, like setTimeout. Suppose I...

And, for clarity, the return value of the function doSomething in this example is still a promise - because async functions return promises. So if you wanted to access that return value, you would have to do …

promise.all takes an array of promise objects, created from the return values of functions you have called already. "Now, I can put all functions in an array and can do Promise.all (array of functions)" …

Jun 1, 2015 · No such synchronous inspection API exists for native JavaScript promises. It is impossible to do this with native promises. The specification does not specify such a method. Userland libraries …

Mar 24, 2016 · Promises (ou Promessas) são uma abstração utilizada para representar fluxos de ações em código assíncrono, sendo que em JavaScript uma Promise é um objeto que representa o …

Instead of using promises for limiting http requests, use node's built-in http.Agent.maxSockets. This removes the requirement of using a library or writing your own pooling code, and has the added …