May 14, 2026
Code poetry or keyboard chaos?
Saying Goodbye to one line of APL
One tiny code line wowed fans, confused everyone else, and sparked a mini comment war
TLDR: A developer said goodbye to a beloved one-line program that helps run his blocky 3D game, and fans treated it like a masterpiece. In the comments, people split between praising the beauty of dense code, sharing old APL memories, and joking that the bigger problem was the broken website.
A game developer posted a heartfelt goodbye to a single line of code that helped power his handmade block-building game, and the community immediately turned it into a full-on spectacle. The line itself looks like keyboard soup to most humans, but that was exactly the point: fans of APL, a famously compact programming language, showed up to celebrate it like it was poetry. The author says he learned the language only months ago and still got his game running above 60 frames per second on a laptop, which had commenters impressed that something so weird-looking was also so effective.
But the real fun was in the reactions. One camp basically said, this is art, not code. Harperlee leaned into the mythology, saying APL was made for chalkboards and dense thinking, turning the whole thing into a romantic defense of tiny, brain-bending programs. NetMageSCW piled on with nostalgia, sharing a favorite one-line trick and praising how APL changes the way people think. Meanwhile, the most relatable comment came from someone who didn’t debate the code at all and just pointed out the site’s certificate was broken — a perfect internet moment where deep technical admiration crashes into “uh, your page is busted.” Another commenter skipped the philosophy entirely and dropped a YouTube link so people could just watch the voxel game in action.
So yes, the post was about one line of code. But the comments made it about genius, readability, nostalgia, and the eternal online tradition of somebody noticing the website is broken first.
Key Points
- •Kyle Croarkin says he has been building a voxel game in Dyalog APL for nearly seven months after beginning to learn APL about nine months earlier.
- •The game reportedly implements systems such as Perlin noise terrain generation, block geometry conversion, frustum culling, and collision directly in APL.
- •The featured one-line APL expression computes which faces of a voxel chunk are exposed so they can be sent to the vertex buffer for rendering.
- •The code works by shifting a 3D boolean `solid` array along three axes in both directions, comparing shifts to the original array, and forcing edge blocks visible to handle wraparound.
- •Croarkin says the approach was directly inspired by the famous APL Game of Life one-liner and reflects ideas he had already sketched during his first week learning APL.