How can I run an external command asynchronously from Python?

I need to run a shell command asynchronously from a Python script. By this I mean that I want my Python script to continue running while the external command goes off and does whatever it needs to...

Scrapy Crawl URLs in Order

So, my problem is relatively simple. I have one spider crawling multiple sites, and I need it to return the data in the order I write it in my code. It's posted below. from scrapy.spider import...

Background tasks in JavaScript that do not interfere UI interaction

I am working on a mobile App implemented in JavaScript that has to do lots of background stuff -- mainly fetching data from a server (via JSONP) and writing it into a database using local storage....

Calling Java methods asynchronously using JNI

I've been trying to get familiar with JNI and its functionality. I am trying to figure out how could I possibly keep reference to the Java environment. I am first calling native method that stores...

Heap optimized for (but not limited to) single-threaded usage

I use a custom heap implementation in one of my projects. It consists of two major parts: Fixed size-block heap. I.e. a heap that allocates blocks of a specific size only. It allocates larger...

What happens to the thread when reaching 'await' on 'async' method?

My question as the title suggest is about the background of 'async' and 'await'. Is it true to say that what the current thread reaches 'await' keyword, it goes to "sleep", and wakes up when the...

Determine whether a method is synchronous or asynchronous

In node.js, is it possible to determine (using a function) whether a method is synchronous or asynchronous? I'd like to write a function that does the following: function isSynchonous(methodName)...

Using HTML templates to send emails in python

I'm trying to write a separate mail service, which is decoupled with our Flask application. I'm looking for a way to send welcome emails when users first log into our Flask application. I'm using...

How to handle multiple async tasks in angular.js?

Working on a sandbox app to learn angular.js I have encountered the following pattern in several places in my code. I find myself having to query the mongoDB in a loop. As I understand it, each...

Express Formidable upload - check file extension, move and delete

I am working on a file upload form with Express 4 and Formidable and have some problems. What I'm trying to achieve is: -Check if file is selected and extension/format before file is uploaded to...

Spring boot. How to Create TaskExecutor with Annotation?

I did a @Service class in Spring Boot application with one of the methods that should run asynchronously. As I read method should be @Async annotated and also I have to run a TaskExecutor bean....

How to transmit initial payload to the client in ActionCable subscribed callback?

I have Ruby on Rails application which is using ActionCable for real-time client communication. I have ScoreChannel which is responsible for streaming user score updates: class ScoreChannel <...

How to handle multiple requests in parallel with SpringBoot's @RestController?

I am relatively new to Spring Boot and started with the very simple example from their getting started site, which is (on the controller side): @RestController public class HelloController { ...

'QML Connections: Cannot assign to non-existent Property' despite the opposite being true

So, I checked the following questions, which seemed most similar to my existing...

Difference between @Asynchronous and EJB Concurrency Utilities in Java EE 7 -ManagedExecutorService

What is the difference between @Asynchronous and the new EJB Concurrency Utilities in Java EE 7 ManagedExecutorService. When should i use one over the other.

Execute long task in background using Promise

In my angular2 application I have a method which might be taking long time so I'm using promise to perform it asynchronously. I want calculation to be in background so GUI will continue to work as...

Asynchronous xmlhttp request in react

I am trying to implement asynchronous XMLHttpRequest in react. Here is my attempt: var xhr = new XMLHttpRequest(); var json_obj, status = false; xhr.open("GET",...

How to read file with async/await properly?

I cannot figure out how async/await works. I slightly understand it but I can't make it work. function loadMonoCounter() { fs.readFileSync("monolitic.txt", "binary", async function(err, data)...

How does the delay function in Kotlin internally work?

I have been trying to understand how Kotlin coroutines work and I came across the delay function. My understanding of this works is, delay suspends the current thread, where the thread, unlike...

How to parse JSON Data from a network and save it into Flutter SQFLite database?

I am able to load JSON data from a network and display it in a ListView directly without caching it in a database, meaning without network connection I cannot load the list again. So being a...

How can we block event loop?

I have studied about the event loop in Node.Js, it work in asynchronous and non-blocking manner to process the request. Is there any way so that we can block the execution of event loop?

C# Manually stopping an asynchronous for-statement (typewriter effect)

I'm making a retro-style game with C# .NET-Framework, and for dialogue I'm using a for-statement, that prints my text letter by letter (like a typewriter-effect): I'm working with different...

Angular i18n - dynamically load translation

I need to asynchronously load the translation for my Angular app. I'm trying to utilize loadTranslations function from @angular/localize module. The problem is that it only works if I put it to...

React-query: how to update the cache?

I have a very basic app that fetches a user and allows to change his name. I fetch the user with React query so I can benefit from the cache feature. It works. However, when I want to update the...

flutter dart get.http response giving html instead of json api

Yesterday the code works and returned me api json but not anymore now. This is the url im using: https://www.instagram.com/p/CKNvnNOFPol/?__a=1 And this is what im getting from that link: Image:...

Problems with starflut package Flutter - App does not start

i am using Flutter to code my app and want to integrate Python. I wanted to use the package "starflut" for this (tell me if there is a better option to use Python Back-end), but if I follow the...

Why does C++'s async/await not need an event loop?

For someone who has some async experience from other languages (Python/JavaScript), when talking about async/await there is always an assumption that there is an event loop somewhere. But for C++...

SpeechRecogntion quality is extremely poor especially compared to Word

I'm using the WPF speech recognition library, trying to use it in a desktop app as an alternative to menu commands. (I want to focus on the tablet experience, where you don't have a keyboard). It...

loadable-components: failed to asynchronously load component

I have created module A which is a component library for my React App. Which I plan on using on module B which is my actual React App. I have an index.js whereby I export my components from module...

Swift Async let with loop

I want to get data in parallel. I found an example to call API in parallel but I want to store async let variables with loop. Async let example. However, this example doesn't use a loop. async let...