78 exercises found
Discover how Vim automatically recognizes file types and makes your code beautiful and readable.
Learn how read replicas solve the most common database bottleneck by distributing read operations across multiple database copies.
Discover sharding - the technique that allows databases to handle massive scale by splitting data across multiple independent databases.
Learn how your application intelligently routes requests to the right database shard without users ever knowing.
Discover how your web browser is already caching tons of stuff to make websites lightning fast, and why this matters for system design.
Every website is built with three languages working together — and JavaScript is the one that makes things actually happen.
JavaScript started in browsers, but today it powers servers, mobile apps, and even desktop software — one language, endless possibilities.
Before we write code, let us see the kinds of things JavaScript can make happen — so you know exactly what you are working toward.
You do not need to install anything. Your browser already has a JavaScript playground built right in.
console.log() is how JavaScript talks to you — it prints any value so you can see what your code is doing.
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