Computers are becoming more powerful, thanks to GPUs and multi-core CPUs. Equally, applications are getting more complex as they leverage threads (independent execution units in a process) for maximum application performance and responsiveness. In this article, we will explain what multithreading is, and how Node.js handles asynchronous operations using the event loop and worker pools. We'll also discuss how to use the Node.js worker-threads module to create and manage threads. Let's get started!

This is the first part of a two-part series about maintainable code in Elixir. In this part, we will show how code predictability plays a crucial role in a project's short and long-term health. We will use Elixir's built-in features for this, like the pipe operator, tuples, and with blocks. First, we'll explain what predictability is and why it is so important. Then we will go through some tools that Elixir already has and how you can use them to write better code.

In this article, we will configure Capistrano in a Ruby on Rails application. We will then deploy the app to a cloud instance that runs Ubuntu as an operating system, independent of your hosting provider. You can use any cloud service, or even an on-premises server, to test or replicate the steps we'll take. Once we've deployed the app, we'll look briefly at how you can monitor your app's deployments using AppSignal. But first, you might ask: why should I use Capistrano in the first place?

Writing tests for an application is the most difficult but necessary element of a development process. Tests ensure correct code maintenance and enhanced code quality. In this tutorial, we’ll show the best way to handle side effects in your Node.js applications. But first, let's define side-effects.

Hotwire is a hot topic at the moment for every Rails developer. If you work with Rails, there is a good chance you have already heard a lot about it. Hotwire is a completely new way of adding interactivity to your app with very few lines of code, and it works blazing fast by transmitting HTML over the wire. That means you can keep your hands clean from most Single Page Applications (SPA) frameworks.

In the first part of this two-part series, we examined LiveView assigns in detail — demystifying assigns, looking at some key concepts, and debugging. Now, we'll turn our attention to three common mistakes that you might make with assigns and how to avoid them. Let's get started!

A state machine can hold all possible states of something and the allowed transitions between these states. For example, the state machine for a door would have only two states (open and closed) and only two transitions (opening and closing). On the other hand, complex state machines can have several different states with hundreds of transitions between them.

Let's face it. Nobody wants to see a broken, empty page while surfing the web. It leaves you stranded and confused. You don't know what happened or what caused it, leaving you with a bad impression of the website. It is often better to communicate the error and let the user continue to use the app. The user will get less of a bad impression and can continue to use its features. In today's post, we'll go through different ways to handle errors in React applications.

Phoenix LiveView lets you develop full-stack apps with client-side interactions while mostly avoiding cross-stack hassle. Assigns, managed by the LiveView socket, are a core tool for making that happen — allowing you to store, present, and update data effortlessly and efficiently. But as they do so much, assigns come with their own complexities and may backfire if misused.

Picture this scenario: you are a Rails developer and have spent the last couple of days developing that awesome feature that everyone is waiting for. It's big and complex, but it went through rigorous testing, so you are confident everything works as it should. There are deadlines to meet, so you deploy. Immediately, all hell breaks loose. Your feature straight up breaks the entire app for some of your users. It's hard to say why. No bugs showed up during testing.