Gwang-Jin Kim - AI, Coding, and Digital Experiments

AI, Coding, and Digital Experiments

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Gwang-Jin Kim

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

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