Event loop refers to an infinite cycle of actions which is used for processing data based on callbacks and messages.
An event loop watches for I/O and timer state changes. It queues functions while waiting for unavailable resources, then dispatches them when resources are available.
In my project I need to create many connections with discord bots. I have created a function for creating new thread that handles connection (so each thread sould handle one connection) but I am getting Runtime error: this event loop is already…
I'm learning event loop of nodejs.
I have some of question after reading in document.
Each phase has a FIFO queue of callbacks to execute. While each
phase is special in its own way, generally, when the event loop
enters a given phase, it will…
I have been working with JS for about a year now and I'm still learning it. My question is at the end.
In the first example:
console.log('Start');
setTimeout(()=> console.log('inside callback'), 0);
console.log('End');
outputs
Start
End
inside…
I've developed a pattern to use for a commanding a python daemon through cmd module shell using an eventloop. However, its not ready yet because I can't figure out how to gracefully exit the two applications (I'm still learning asyncio and can't…
I am using the following code to see if the JavaScript execution gets blocked while a synchronous function gets into a long loop.
function delayBySeconds(sec){
let start = now = Date.now();
while((now - start) < (sec * 1000)){
…
I'm trying to understand the order of execution of javascript asynchronous code in the event loop.
Here's my very short code snippet.
How can we explain the actual order of execution: in promise -> end -> in then? Why does the promise constructor…
The following problem originates from https://github.com/cycfi/elements/issues/144 which is me struggling to find a way in elements GUI library to invoke a callback once per frame.
So far in every library I have seen, there is some callback/explicit…
I was looking into how Node JS executes code. If I set the 'sleep' parameter to 1 in both functions it works as expected.
But with different delays in the two functions, it skips iterations for the function with the longest delay.
I would expect…
We save the setTimeout reference to be able to cancel it in the future. when we call clearTimeout
will it immediately take it out of callback queue
or
it will wait for the callback's turn and prevent it from running in that point in time
here…
I have a confusion regarding after the settimeout finishes what does it put in the callback queue does it put the function name/function defination(that we pass as parameter to the settimeout) or the function invoked
function cb(){
…
I am clarifying a doubt that I have regarding how Node.js executes timers. Normally when having a setTimeout block in your node script, the event loop, even if does not have anything else will wait for specified milliseconds in setTimeout and exits…
I have this doubt regarding order of execution of Timer functions , microtasks and event listeners :
let promise = Promise.reject("Err@!");
setTimeout(() => {
promise.catch(er => console.log(er, "Caught !")); //…
I'm trying to use the Streambuilder in cooperation with Bloc. The problem is that somehow the UI updates only when the expensive Funktions are finished. It seems that then, and only then updates are made to the stream. But I can not figure out…
I have a websocket server in node.js which allows users to solve a given puzzle.
I also have a code that generates random puzzle for about 20 seconds. In the meantime I still want to handle new connections/disconnects, but this synchronous code…
