AI, Coding, and Digital Experiments

AI, Coding, and Digital Experiments

Sign in Subscribe

Beyond If-Else: Smarter Function Dispatch in PHP

Beyond If-Else: Smarter Function Dispatch in PHP

How to Implement and Package Multiple Dispatch for PHP—A Complete Practical Walkthrough

Installing PHP 8 on MacOS, Linux, and Windows with phpenv — The Hard Way (But Right)

Installing PHP 8 on MacOS, Linux, and Windows with phpenv — The Hard Way (But Right)

You don’t install PHP manually on macOS unless you’re one of three things: * a developer, * someone building something reusable, * or a masochist with too much time. In my case? All three. This guide is the result of a battle-tested PHP 8.4.8 installation via phpenv on macOS,

The Power of Multiple Dispatch in Python

The Power of Multiple Dispatch in Python

The Secret Sauce Behind Julia and Lisp — Now in Python

Problem-Solving Like a Python Pro

Problem-Solving Like a Python Pro

Learn how to solve problems like a Python pro using clean code, functional thinking, and scalable design patterns—no fluff, just power.

Modern TDD with Python in 2025 — Step by Step, with AI at Your Side [part 5/10]

Modern TDD with Python in 2025 — Step by Step, with AI at Your Side [part 5/10]

GitHub Actions + Pre-commit — Guardrails, Not Bureaucracy “Stop pushing broken code. Gently.” So you’re flying. You’ve written clean tests. You’re in the vibe. You’re pairing with GPT. Your code is elegant, correct… and only tested locally. But one day — future-you (or your teammate) does this: git commit

Past Performance Is Not Future Brilliance

Past Performance Is Not Future Brilliance

Why Safe Hires Make Safe Bets — and How 10% Risk Could Change Your Company Forever We say we want innovation. But we hire like we’re afraid of it. I’ve never had the final say on a hire. But I’ve seen them come and go. I’ve read

Modern TDD with Python in 2025 — Step-by-Step, with AI at Your Side [part 4/10]

Modern TDD with Python in 2025 — Step-by-Step, with AI at Your Side [part 4/10]

Vibe Coding with TDD — Yes, It’s Possible

GitHub Actions for Lazy Developers (Like Me): How I Stopped Writing YAML and Let ChatGPT Do the Work

GitHub Actions for Lazy Developers (Like Me): How I Stopped Writing YAML and Let ChatGPT Do the Work

Because automation should save time, not cost you your weekend. “So What Can GitHub Actions Actually Do For Me?” GitHub Actions is a free (within limits) automation engine built into GitHub. It can run whenever you: * Push or pull code * Open a PR * Create a release * Star your own repo

Object-Oriented Programming in R: What S4 Can Do That S3 and Python Can’t

Object-Oriented Programming in R: What S4 Can Do That S3 and Python Can’t

Learn How to Build Real DSLs and Frameworks Using R’s Most Misunderstood OOP System “At first, I avoided S4 like it was a cursed tome from an arcane library… Now I see it for what it is: a grumpy, structured, but immensely powerful wizard. — A reformed R programmer Welcome

The Zen of Undoing in Git: 7 Peaceful Ways to Fix a Mistake

The Zen of Undoing in Git: 7 Peaceful Ways to Fix a Mistake

A calm, hands-on guide to recovering from Git mistakes using reflog, restore, reset, and more.

How I Self-Host My Ghost Blog with Caddy in Docker

How I Self-Host My Ghost Blog with Caddy in Docker

A walkthrough with real errors (and fixes) So you want a blazing-fast, auto-HTTPS blog on your own domain, powered by Ghost and reverse-proxied by Caddy — all in Docker? Well, you just did it. Here’s exactly how, including every bump and how to smooth it. Step 1: Start with the

Coming soon

This is gwangjinkim, a brand new site by Gwang-Jin Kim that's just getting started. Things will be up and running here shortly, but you can subscribe in the meantime if you'd like to stay up to date and receive emails when new content is published!