A secret to writing good tests is keeping in mind that there are only two reasons for a test to exist: 1. Making sure your code works as expected. 2. Avoiding regression bugs. That’s it. There are no other reasons for a test to exist. …

As a follow-up to my previous article about CentOS 8 issues, I’d like to show how to fix a similar issue with a new CentOS 8 installation, namely, “Error setting up base repository”. I was setting up CentOS on a VMWare virtual machine, and here’s how the issue looked like: …

If you use CentOS 8, you might have noticed that starting from January 31, 2022, installing packges with yum no longer works with an error No URLs in mirrorlist, similar to the following: Error: Failed to download metadata for repo 'appstream': Cannot prepare internal mirrorlist: No URLs in mirrorlist The…

This isn’t yet another article about the bad parts of JavaScript, the heaviness of your node_modules folder, crazy webpack build times, or thousands of trivial leftpad-like imported modules. I‘d like to look at the modern web from a different perspective. From the perspective of UI automation. I was working on…

I’ve just passed the Google Foobar challenge and wanted to share my experience and some useful tips. …

This article should serve as a very simple cheat sheet for everyone who needs to write LaTeX mathematical formulas in Jupyter Notebooks. It’s by no means complete, as the full description of LaTeX notation takes up hundreds of pages. But I’ve tried to gather the stuff I typically use. …

In this article, I’d like to share my setup for writing notes in Markdown with mathematical formulas using LaTeX syntax. I use vim and neuron for that. I mostly work on Mac, but the setup for my Linux laptop doesn’t differ significantly. neuron for notes neuron implements a note-taking approach called Zettelkasten. There’s…

This article is written after an evaluation of trunk-based development and feature toggles for my project. …

A hidden gem in the standard Java library is the RuleBasedCollator class. It allows you to define custom collation — a set of rules for comparison between different characters in a string — in a flexible way. Your use cases might be one of the following: you need to sort…