Welcome Photo
Welcome Photo

Hi, I'm Gabriel Romualdo!

I am a young web developer (in high school) who is devoted to building something new with code, pushing my limits, and making a name for myself in this rapidly growing field.

About: an introduction and a short history
Blog: 30+ articles I've written about code
Projects: projects I've built and worked on
Résumé: what I've done, what I know, and what I offer

Scroll down to see the latest from me, and I hope you enjoy this site.

— Gabriel Romualdo, October 21, 2020

How to Set Up Rate Limiting and Rate Slowing Down in Express.js

Rate limiting is the process of preventing repeated requests to a server in effort to remove spam requests. Typically, a limit is set, such as 200 requests to the server ...

Programs to Compute Trig Functions in Python, JavaScript, & Perl (with Maclaurin Series)

Have you ever wondered how your computer calculates certain mathematical functions, like division, or trigonometric functions like sine or cosine? Well, for some of these...

How to Use the HTML5 Gamepad API (with complete examples)

The HTML5 Gamepad API is one of the more exciting HTML5 APIs in my opinion. The API allows browser games and sites to take input from real game controllers connected to t...

How to Schedule Cronjobs in Python

How to Schedule Cronjobs in Python

  • December 12, 2020

  • Est. 2 min read

Cronjobs are tasks that can be run periodically, such as every five minutes, or every day at midnight, or even every Friday at noon. Cronjobs have a number of different u...

How to Generate the Sierpinski Triangle in Vanilla JavaScript with HTML5 Canvas

The Sierpinski triangle is a famous mathematical figure which presents an interesting computer science problem: how to go about generating it. In this article I'll explai...

Performance of AI Algorithms in Playing Games — Empirical Evidence From Jupiter, My 2048 AI

I recently worked on an open source project called Jupiter, an online AI written in JavaScript to beat the popular online game 2048. In this article, I'll be analyzing th...

I Built Jupiter – A Machine Learning Based 2048 AI that Runs on the Web

Today I'm proud to release my online 2048 AI, Jupiter. Jupiter uses a machine learning method called the Monte Carlo Tree Search (MCTS) algorithm. I've released an articl...

Using the Monte Carlo Tree Search Algorithm in an AI to Beat 2048 (and other games)

I recently worked on an open source project called Jupiter, an online AI to beat the popular online game 2048. In writing this AI, I decided to use a machine learning met...

How to Parse XML in Python

How to Parse XML in Python

  • August 8, 2020

  • Est. 3 min read

I recently spent a few hours refactoring some of the backend code on this site at xtrp.io. In changing the backend, I wanted to make sure the refactored code worked the s...

Build and Deploy a Discord Bot with Node and Discord.js in 5 minutes

Discord bots can be useful in doing a variety of things like playing music in a voice chat, or sending automated announcements when a Youtuber releases a new video. I'm a...

How to Create a Beautiful Custom Scrollbar for Your Site in Plain CSS

Custom scrollbars on the web can make a site or design stand out. They can help in portraying key design aspects of a site, whether that be a specific color or a particul...

AP Test Submission Problems Show Lack of Developer Adoption of .HEIC File Type

Due to lockdown and quarantine in numerous countries, this year's AP tests were moved to an online platform created by College Board, the creator of the AP program and ot...

I Built Coronavirus Live Monitor - stats, news, and WHO press releases on the virus all in one place

Today, I am proud to release my latest web app and project: Coronavirus (COVID-19) Live Monitor, your hub for news and information on the Coronavirus outbreak. The code c...

IIFE

IIFE's in JavaScript Explained in 3 Minutes

  • February 29, 2020

  • Est. 3 min read

Global variables can cause serious problems and bugs in large-scale projects and web apps. IIFE's solve this problem by wrapping code in an immediately invoked function, ...

Create a Reading Scroll Progress Bar for Your Blog in JavaScript and CSS

I just recently added a fun little feature on my website at xtrp.io: a progress bar when reading blog posts. The bar would show how far users have progressed in reading a...