React
What Is React, and Why Does Everyone Build Components?
React lets you build a UI out of small, reusable pieces instead of one giant tangle of markup and jQuery.
Tutorials
All tutorials
Docker
What Is Docker, and Why Should You Care?
Docker packages an app with everything it needs to run, so it behaves the same on your laptop, a teammate's machine, and the server.
Python
What Is Python, and Why Does Everyone Recommend It?
Why Python became the language everyone tells beginners to start with, and what it actually trades off to get there.
JavaScript
What Is JavaScript, and Why Is It Everywhere?
JavaScript and Java are basically unrelated. Here's what JavaScript actually is, and why it ended up everywhere.
C++
What Is C++, and Why Does It Refuse to Go Away?
C++ should have been replaced by now, according to some people. It still runs game engines, browsers and operating systems.
Spring Boot
What Is Spring Boot? A Beginner's Introduction
A plain-English intro to what Spring Boot is, why it exists, and what problems it solves for you.
Spring Boot
Setting Up Your First Spring Boot Project
Step-by-step: create a fresh Spring Boot project using Spring Initializr and run it.
Spring Boot
Understanding the @SpringBootApplication Annotation
What the main annotation actually does and why every Spring Boot app has it.
Spring Boot
Configuration with application.properties
Change how your app behaves using a simple settings file, no code changes needed.