Mohamed Mayallo

@mayallo

Self-taught Software Engineer

Joined February 2022

About

I'm a Software Engineer Passionate about Clean Code, Design Patterns, and System Design. Learning something new every day. Feel free to say Hi on LinkedIn at https://www.linkedin.com/in/mayallo

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Mohamed Mayallo's blogs

Mohamed Mayallo's Blogmayallo.hashnode.dev26 posts

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mayallo.hashnode.dev

Untangle Your Code: Chain of Responsibility Design Pattern

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...

Sep 28, 20259 min read

mayallo.hashnode.dev

SQL COALESCE in Postgres: A Simple Guide

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 ...

Jun 9, 20254 min read

mayallo.hashnode.dev

Nx Monorepo Guide: React & Node Fullstack App

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...

Jun 5, 202515 min read

mayallo.hashnode.dev

TypeScript Type Vs Interface? The Answer Is Type!

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...

May 19, 20254 min read

mayallo.hashnode.dev

Deep Copy vs Shallow Copy in JavaScript: Complete Guide

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...

May 18, 202510 min read

Mohamed Mayallo

About

Available for

Mohamed Mayallo's blogs

Recently published

Untangle Your Code: Chain of Responsibility Design Pattern

SQL COALESCE in Postgres: A Simple Guide

Nx Monorepo Guide: React &amp; Node Fullstack App

TypeScript Type Vs Interface? The Answer Is Type!

Deep Copy vs Shallow Copy in JavaScript: Complete Guide

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Mohamed Mayallo

About

Available for

Mohamed Mayallo's blogs

Recently published

Untangle Your Code: Chain of Responsibility Design Pattern

SQL COALESCE in Postgres: A Simple Guide

Nx Monorepo Guide: React &amp; Node Fullstack App

TypeScript Type Vs Interface? The Answer Is Type!

Deep Copy vs Shallow Copy in JavaScript: Complete Guide

Nx Monorepo Guide: React & Node Fullstack App

Nx Monorepo Guide: React & Node Fullstack App