Tutorials
6 articles
JavaScript Basics: The Concepts Every Beginner Actually Needs
Skip the trivia — here's the small set of ideas that unlocks reading and writing real JavaScript
Variables, functions, and events cover most of what you'll actually touch as a beginner. A practical walkthrough of JavaScript's core concepts, with runnable examples for each one.
How HTTPS Works — What's Really Happening Behind the Padlock
The genuinely clever trick that lets two strangers agree on a secret while being watched
Every time you see the padlock icon, your device and a server just agreed on a shared secret in public, safely. Here's the actual mechanism — the key exchange and the certificate trust system — and what the padlock does and doesn't guarantee.
How Database Indexes Work — Why the Same Query Can Take 2ms or 8 Seconds
The phone book analogy that actually explains it, and how to find the problem with EXPLAIN
The same query on the same table can take milliseconds or seconds depending entirely on whether the database has an index to use. Here's what an index does, and when adding one hurts more than it helps.
Docker for Complete Beginners: What It Solves and How to Get Started
From "works on my machine" to your first container, without the orchestration jargon
Docker packages an application with everything it needs so it runs identically anywhere. Here's what a container is, your first real commands, and where beginners get confused.
SQL Basics: The Queries Every Beginner Should Know
Ten queries that cover most of what you'll use day to day, with runnable examples
Ten SQL queries that cover most day-to-day database work, with runnable examples — SELECT, filtering, joins, aggregation, and the mistakes that trip up beginners.
Git and GitHub for Complete Beginners: A Step-by-Step Guide
From your first commit to your first pull request, without the jargon
A practical walkthrough of Git and GitHub — what problem version control solves, the five commands you'll use daily, and how to set up your first repository.