Programming Tutorials

In some optimized PHP applications, you may occasionally see “strange code” like $this->array = [] after heavy usage. There’s an array that held many

The Problem If you have ever integrated a payment processor, you know the drill. You read through a PDF that was last updated in 2019, fi

A consequence of full cURL integration into the EventLoop. The option CURLOPT_FILE => $fp tells #cURL to write output directly to a file, which goes t

The bug was alive for three weeks. On a normal day it cost nothing. On the day it activated, it nearly took the service down. The pattern was simple.

A high-performance, local-first analytics dashboard for your Garmin FIT files, built with Rust and DuckDB. If you are a runner, cyclist, or data-driv

Creating a data platform has been made easier by cloud data analytics platforms like Databricks, Snowflake, and BigQuery. They offer excellent ramp-up

Re-running an import shouldn’t change your data. But does it? Handling repeated operations is a common problem in applications that deal with imports

Why this series exists If you are a backend engineer, you already know how to build reliable systems. You know how requests flow through s

Introduction In Java, a Collection is a framework that provides architecture to store and manipulate groups of objects. It is part of the Java Collec

In my last post, I talked about my first week learning Go — the confusion, the messy first commit, and why I picked Go over sticking with JavaScript.

OpenAI Codex is a specialized artificial intelligence system designed to translate natural language into code. We just published a course on the freeC

Level up your system design skills! We just published a course on the freeCodeCamp.org YouTube channel that progresses from foundational concepts to p

In Java, operators are used to perform different kinds of operations on variables and values. Instead of writing long logic, operators help us do thin

Master FastAPI: Develop High-Performance APIs with Python 2025 As we move into 2026, the demand for lightweight, high-speed backend service

Exploring the Limits of Asynchronous JavaScript with Fibers Introduction Asynchronous programming in JavaScript has evolved thro

Building a Dynamic Dashboard with Flask, Jinja2, HTML, CSS, and JavaScript Dashboards are one of the most common and valuable interfaces in

Exploring Modern Backend Development with Rust and Go: Insights from Web Developer Travis McCracken As a passionate Web Developer, I’ve spent countle

Every side project I start does the same thing to me. New idea. Open editor. Spend 2-3 days on things that had nothing to do with the idea itself. Set

"Cool. I just did discovery, systems design, and tool selection for free." We'd spent most of the conversation talking through workflow bottlenecks

You know the folder. Every automotive project has one. /public/logos/ toyota.png honda.png ford.png kia.png ← this one's wrong k