@mayallo

Untangle Your Code: Chain of Responsibility Design Pattern

Sep 28, 2025 · 9 min read · Introduction As developers, we’ve all been there: a single function bloated with a lot of responsibilities. It starts simple, and soon, the logic becomes a tangled mess that’s hard to read, maintain, and extend. The Chain of Responsibility Design Pat...

SQL COALESCE in Postgres: A Simple Guide

Jun 9, 2025 · 4 min read · Introduction In a database, we often find empty places in our tables. These are not zeros or spaces; they are special markers called NULL. A NULL value means "no data." This can be a problem. Let's see how the SQL COALESCE function can help us solve ...

Nx Monorepo Guide: React & Node Fullstack App

Jun 5, 2025 · 15 min read · What is a Monorepo and Why Nx? Ever find yourself checking many projects, each in its own GitHub repo, making updates feel like fixing one thing just makes another pop up? I know I used to. It's often difficult to keep track of all the different vers...

TypeScript Type Vs Interface? The Answer Is Type!

May 19, 2025 · 4 min read · Introduction In TypeScript, you can define custom shapes using type aliases or interface. But when it comes to choosing between them, many developers ask: "TypeScript Type vs Interface?" The answer is increasingly clear: use type. While both share si...

Deep Copy vs Shallow Copy in JavaScript: Complete Guide

May 18, 2025 · 10 min read · Understanding Object References in JavaScript Have you ever changed something you thought was a separate copy, only to find you messed up the original data too? Yeah, that happens a lot if you don't get how JavaScript handles different kinds of copyi...