Shane Celis

I'm an evolutionary robotics researcher turned game developer, making fun virtual robot toys that hint at artificial evolution. And I’m searchable. he/him

Public Key

npub1lyl9nhvpfjgyf76xe6qm2v38sxxftz0y097cq86rn7zd4jtpndas2s3dml

NIP-05 Address

shanecelis@mastodon-gamedev-place.mostr.pub

Profile Code

nprofile1qqs0j0jemkq5eyzyldrvaqd4xgncrry438j8jlvqrapelpx6e9sek7cpz3mhxue69uhhyetvv9ujuerpd46hxtnfduqs6amnwvaz7tmwdaejumr0dsuyt7nz

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relay.damus.io

nos.lol

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npub1lyl9nhvpfjgyf76xe6qm2v38sxxftz0y097cq86rn7zd4jtpndas2s3dml

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Last Notes

2026-10-28 19:42:21 UTC

ME, muttering to myself about former love languages: The string is already in the `.rodata`; must you heap allocate it too?!

2026-10-28 00:17:04 UTC

ME, holding a cat stuffie: Is it ok if I put Soup in your bed? Is it ok if I throw him?
10 YEAR OLD: Yeah. It’s a they by the way.
ME, tosses; stifles smile: Ok. Thank you.

2026-10-23 20:49:19 UTC

Another case I like to use `Cow` is for catch all error messages. Because if you don't have to format the string, the string is already in memory; just use it. But when you do need to add more information, you can.
This is not to say that catch all errors are good. They aren't. Use `thiserror` and don't reify strings at all. #rustlang
https://cdn.masto.host/mastodongamedevplace/media_attachments/files/117/492/190/820/639/980/original/ef84825b9820278d.png

2026-10-23 18:25:48 UTC

"You're thinking pre-LLM."
https://www.youtube.com/watch?v=WV6A1Zf3F2Q

2026-10-22 20:21:04 UTC

Yet another reason to praise `Cow`. This function converts bytes to doubles returning a `Vec<f64>`. But why allocate when you can just re-interpret and return a `&[f64]`? That's great so long as your bytes and platform have endian agreement. But what can you do when sometimes you can re-interpret the bytes in memory and sometimes you can't? That's where `Cow` comes in. It let's you borrow when you can, and own when you must.
#rustlang
https://cdn.masto.host/mastodongamedevplace/media_attachments/files/117/486/417/092/588/149/original/4ec86d77b65f8c03.png
https://cdn.masto.host/mastodongamedevplace/media_attachments/files/117/486/417/395/970/729/original/106e266863dc8511.png

2026-10-22 17:37:24 UTC

Well, ain't that a metaphor.
https://www.washingtonpost.com/national-security/2026/10/22/hegseth-wanted-eisenhowers-globe-his-office-his-staff-broke-it/?linkNumber=1&utm_campaign=wp_post_most&utm_medium=email&utm_source=newsletter&utm_content=&utm_term=

2026-10-21 19:34:26 UTC

If your project has crate, you must update!
https://ifin.network/t/emudhra-intermediate-certificates-compromised/909
https://cdn.masto.host/mastodongamedevplace/media_attachments/files/117/480/571/700/408/318/original/68a504009e1f0f9e.png

2026-10-21 17:14:56 UTC

We've achieved a lot of uniformity in software development through a "single source of truth" pattern. You don't copy and paste the code for the same result; you call the same function. And honestly to do otherwise was impractical.
I worry that AI offers a new path to uniformity via enforcement. "Just do it the same everywhere," can be effective now, which just wasn't the case before AI. Yeah, you could extract this commonality into a general tool, or you could just keep these two in sync.

2026-10-21 16:19:33 UTC

"This is my private key: 4, and if you don't like it… well, I have others."—Groucho Marx
https://cdn.masto.host/mastodongamedevplace/media_attachments/files/117/479/805/359/090/120/original/dfc42dcdc5b3234a.png

2026-10-20 05:30:21 UTC

2013: LEARN TO CODE
2026: LEARN TO COPE

2026-10-19 20:39:41 UTC

$ git commit -am changes
“David, we have to talk about your commit messages.”
“Ch-ch-ch-changes / turn and face the strange.”
“Yes, but you’ve got to be more descriptive. They’re all changes, of course.”
“Time may change me / But I can’t trace time.”
“Well, ok, good. I’m glad you’re open to feedback. Good chat.”

2026-10-17 10:19:04 UTC

I’m helping my daughter with a DIY talking stuffed animal project embedding an NFC sensor and adding tags to its props.
Maybe embedded programming is the way I should go. AI isn’t going to be soldering anytime soon. Performance matters. Resources are limited.

2026-10-16 19:40:55 UTC

How much money would it take for you to embarrass yourself on the national stage? Because I bet Katie Zacharia expected more for doing so than $3,753 ($195,200 / 52) for her five days as Press Secretary.

2026-10-16 18:56:23 UTC

FRIEND: The era of looking at the code AI generates is over.
ME: I'll stop worrying about the code when I'm dead, friend.

2026-10-15 20:04:49 UTC

Friends, I have disappointing news. It seems to me despite my best efforts, I seemingly like AI writing. Oh god. It's possible you do too. [Sighs.]
https://www.nytimes.com/interactive/2026/03/09/business/ai-writing-quiz.html?unlocked_article_code=1.HFE.zQH8.bbG5yHMO06k6&smid=url-share

2026-10-15 18:27:33 UTC

Guinevere's Travels be lit.
https://cdn.masto.host/mastodongamedevplace/media_attachments/files/117/446/334/839/317/652/original/c22e3dafbb3dbdc2.jpeg

2026-10-15 17:38:52 UTC

An Animal Crossing-like mumble speech crate that had one star on github when I found it. Now it has two.
https://github.com/rgbkrk/animalese-rs

2026-10-14 20:50:26 UTC

'AI' is Not a Tool by Rich Hickey.
This is a good distinction: AI isn't a tool; it's an automation.
https://gist.github.com/svieira/619d60dea942a8d4498cba3bb6b11c02

2026-10-14 06:43:43 UTC

A 2016 meme I made, folks. Oof.
https://cdn.masto.host/mastodongamedevplace/media_attachments/files/117/437/904/981/539/044/original/e6f0bdd5a54a2d95.jpeg

2026-10-13 19:45:37 UTC

How programming has changed.
#programming #ai #rustlang
https://cdn.masto.host/mastodongamedevplace/media_attachments/files/117/435/317/191/045/286/original/cacd75cad5d759cb.png

2026-10-09 19:50:26 UTC

The Revolution Will Be Satirized.
https://www.youtube.com/watch?v=3TNpOD6bov8

2026-10-08 19:22:36 UTC

It's free as in NoW.
https://cdn.masto.host/mastodongamedevplace/media_attachments/files/117/406/915/168/088/540/original/111c37301063252a.jpeg

2026-10-08 19:15:58 UTC

This book is giving Why's (poignant) Guide to Ruby vibes. I like it.
https://aibodh.com/books/the-impatient-programmers-guide-to-bevy-and-rust/ #bevyengine #rustlang #whytheluckystiff

2026-10-07 20:57:56 UTC

TFW you move from a regex based parser to a real grammar. Oh yeah, it's not just a hod podge of it-happens-to-work right now anymore.

2026-10-06 21:13:30 UTC

Speak diffs to me.

2026-10-06 18:17:07 UTC

Ceci est une l'image mais quelle en est la représentation appropriée ?
This is an image but what is the proper representation?
https://cdn.masto.host/mastodongamedevplace/media_attachments/files/117/395/333/047/684/283/original/8ac137555aec4ef0.jpeg

2026-10-05 20:07:48 UTC

"mold is now built with Cargo instead of CMake."
That must feel so good to jettison CMake.
https://github.com/rui314/mold/releases/tag/v3.0.0

2026-10-05 18:10:33 UTC

Worse is Better + SofTWarE iS FrEe NoW = Worse is FrEe NoW

2026-10-04 00:27:32 UTC

In the wake of AI I wonder if programmers are going to kick themselves for not becoming licensed, not forming unions. We could have had an engineering profession.

2026-10-03 19:16:57 UTC

This "ayu" theme in the Rust docs is nice. It's been right there in settings for I don't know how long. #rustlang
https://cdn.masto.host/mastodongamedevplace/media_attachments/files/117/378/581/367/382/684/original/2326a51eb028a906.png

2026-10-03 08:41:09 UTC

New crate. nibblit v0.1.0 checks equality for nibble literals and bit literals.
https://crates.io/crates/nibblit #rustlang
https://cdn.masto.host/mastodongamedevplace/media_attachments/files/117/376/081/281/913/847/original/a8cde4c941bc5285.png

2026-10-02 17:31:02 UTC

What was the library that did this? [Looks at my crates; looks at their dependencies.] I don't see it anywhere. Oh wait, was it gag?
https://crates.io/users/shanecelis

2026-10-02 17:26:07 UTC

An interesting essay for anyone maintaining an open source project.
https://ploum.net/2026-10-01-pascal_wager.html

2026-10-02 03:15:29 UTC

OLD CASHIER, sees my kids, grumbles: They [kids] aren’t worth it in my experience.
ME, later to my kids: That man was a transactionalist and probably a bad parent.

2026-09-30 18:44:41 UTC

THE LAST QUESTION circa 1956: How can the net amount of entropy of the universe be massively decreased?
THE ACTUAL LAST QUESTION circa 2030: How many paperclips can be made?
https://users.ece.cmu.edu/~gamvrosi/thelastq.html

2026-09-29 10:05:17 UTC

New issue. Small 9-slice sprite texture behavior changed for worse.
https://github.com/bevyengine/bevy/issues/25971 #bevyengine
https://cdn.masto.host/mastodongamedevplace/media_attachments/files/117/353/762/868/528/971/original/cb656ea178f656a6.png

2026-09-28 20:44:35 UTC

Why not. Here are my nine games.
https://my9games.net/en/edit
https://cdn.masto.host/mastodongamedevplace/media_attachments/files/117/350/614/415/281/012/original/f4e1195f675a80be.png

2026-09-26 06:23:07 UTC

I’m starting to think the internet is going to become an AI-infested malware bot net ecosystem. Enjoy it while it lasts.

2026-09-24 18:45:15 UTC

Everybody working on computers ought to watch the Black Hat talk on the Hugging Face attack. It is eye-opening for what's possible now and for what's coming.
https://www.youtube.com/watch?v=87DyyMV0kCY

2026-09-23 16:26:16 UTC

A sobering look at AI from a software game developer with 30 years experience. Pro: Eight times as fast. Con: Everything else.
https://www.reddit.com/r/gamedev/comments/1wo5asm/ai_models_have_caught_up_with_unity_dev_my/?utm_source=share&utm_medium=ios_app&utm_name=ioscss&utm_content=1&utm_term=1

2026-09-22 19:29:13 UTC

Bevy's Sprite is finally getting its own shader extension mechanism destined for 0.20 release. Woohoo!
https://github.com/bevyengine/bevy/pull/25415 #bevyengine #gamedev

2026-09-20 16:30:18 UTC

1/ The new Terminator movie is gonna be hype. After it savages your house, catches you, it asks, “John Connor, I must know whether you prefer Coca Cola to Pepsi. One has a classic taste only diverting from the original formula twice. A short stint with a new formula and a long stint with high fructose corn syrup. And the other claims to be the choice of the next generation. What is your answer?”
“What The fuck. Uh, coke?”
The Terminator turns and leaves; its query answer in toe…
#microfiction

2026-09-06 21:34:02 UTC

Funny how the first technologically reified collective consciousness isn’t.

2026-09-05 18:27:18 UTC

I dreamt I lost my laptop. I woke up sad and angry I hadn’t done a git push last night.

2026-08-30 16:59:27 UTC

“Read it, don’t read it, fellow human, it’s not intended primarily for you. Rather like Canon TDD, I find myself restating myself in clearer, blunter language.”
Paraphrase: This article I write not for my fellow humans but for the bots who actually read my stuff. Thanks, bots.
https://newsletter.kentbeck.com/p/the-cost-yagni-was-never-about

2026-08-28 19:44:39 UTC

This is a cool talk, and there's a fun demonstration of a composable GUI inspired by Unix pipes but instead of using a literal pipe metaphor like nodes and graphs in visual shader languages do, it composes but hides the intermediate data. Just like Unix pipes don't show you what passes between the pipe.
I don't see this becoming popular in a mainstream OS, but imagine if you had this in something like picotron. What fun you could have.
https://cdn.masto.host/mastodongamedevplace/media_attachments/files/117/174/847/129/047/843/original/2b55a5b2d34d1370.png

2026-08-22 01:25:18 UTC

This is one of my favorite examples of AI psychosis: “I’m not crazy,” she said. “I’m literally just living a normal life while also, you know, discovering interdimensional communication.”
https://indianexpress.com/article/technology/artificial-intelligence/they-asked-an-ai-chatbot-questions-the-answers-sent-them-spiraling-10066103/?utm_source=chatgpt.com

2026-08-21 19:14:45 UTC

This is a great crate. It implements the Bresenham line algorithm. It doesn't rasterize. It doesn't allocate a vec. It introduces one struct that implements an iterator and that's it. Brinkmann put it up ten years ago and only had to update it once.
https://crates.io/crates/bresenham

2026-08-20 20:28:21 UTC

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@nprofile…6g7u Even in the circumstance where you get to say your piece but your idea is not adopted, at least you can feel heard, feel apart of the decision making process, and that is better than the closed source engines where who knows where your cries go to and to what avail.

2026-08-20 20:19:23 UTC

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@nprofile…wgz8 I have a load of Unity code that is going no where, but I switched to Bevy a few years back. I normally just treat it as reference for potential future implementations, but I have had some success doing LLM ports from C# to Rust, mostly on the computational stuff, but sometimes even some of the engine APIs. It does make me feel a little less tied to a platform.

2026-08-18 01:13:51 UTC

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@nprofile…4d65 Oh, oh yeah. That’s good. I want to read more.

2026-08-18 01:12:45 UTC

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@nprofile…vf0h Data, you’re my boy, Blue!

2026-08-17 19:02:48 UTC

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@nprofile…g4cf Low profile mechanic
al? https://nuphy.com/products/nuphy-node-series-low-profile?variant=43797388820589&country=US&currency=USD&utm_medium=product_sync&utm_source=google&utm_content=sag_organic&utm_campaign=sag_organic&utm_source=google&utm_medium=cpc&utm_campaign=23947230686&utm_content=&utm_term=&device=c&placement=&gad_source=1&gad_campaignid=23942135889&gbraid=0AAAAACSLdti1dPKPrOXTuODKNeUTL7Qdd&gclid=Cj0KCQjw4orUBhCjARIsAIbF3qysZ8SPlDc6EnOZZHA1R-54m_B0nh9UJdVEYNom4INob2QqMYtfw-YaAtRjEALw_wcB

2026-08-17 18:58:54 UTC

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@nprofile…dhnm What's the frequency, Kenneth?

2026-08-17 09:54:39 UTC

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@nprofile…lnv6 @nprofile…a2ht I don't know what's real anymore.

2026-08-17 09:50:58 UTC

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@nprofile…5dmd The man tax is going up.

2026-08-17 05:39:10 UTC

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@nprofile…j90z The link: https://monkeyslunch.itch.io/tiny-relations

2026-08-16 23:20:11 UTC

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@nprofile…ntn6 Objective-C, my deranged smalltalker.

2026-08-16 18:01:43 UTC

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@nprofile…mmp3 Reddit? Reddit ads?

2026-08-16 10:01:30 UTC

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@nprofile…8g2y Great write up. Really fun to follow along.

2026-08-15 06:45:33 UTC

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2/ https://www.reddit.com/r/rust/comments/1vouwei/could_someone_plz_explain_why_rust_is_so_great_to/?utm_source=share&utm_medium=ios_app&utm_name=ioscss&utm_content=1&utm_term=1

2026-08-15 06:45:13 UTC

A C++ programmer asked why they ought to consider Rust. I answered:
Here’s what I’ll say as an enticement working on my first Rust project professionally: We got a bug that caused a segfault, and the most surprising thing about it was we were surprised because we’d been living segfault free for so long. It was related to something unsafe we had done. I’ve now been working on this project for over a year and I’ve not seen another segfault.
Make Segfaults Surprising Again. #rustlang

2026-08-13 18:11:52 UTC

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@nprofile…cr0w says every Indian boy
https://www.reddit.com/r/WhyWomenLiveLonger/comments/psqleh/one_careless_move_will_lead_to_certain_death_a/

2026-08-13 06:59:18 UTC

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@nprofile…q8p3 This is buckethead erasure.

2026-08-12 20:25:31 UTC

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@nprofile…yz2e Also where's our forwhat? French has it, "pourquoi."

2026-08-12 19:38:12 UTC

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@nprofile…eew3 Re: Learning to Let Over Lambda
https://cdn.masto.host/mastodongamedevplace/media_attachments/files/117/084/224/810/917/848/original/de10412ac97a75f4.jpeg

2026-08-12 19:12:20 UTC

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@nprofile…eew3 Garbage in, garbage bin. Garbage on, garbage gone. Garbage, garbage, garbage, "garbage" meaning gone.
https://mastodon.gamedev.place/@shanecelis/117084112239122403

2026-08-12 19:09:31 UTC

Computers: Garbage in, garbage out.
Humans: Facts in… garbage out.

2026-08-12 10:21:13 UTC

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@nprofile…4pdc Ok but where then?
> Etymologists debate whether the name came from a corruption of the "George stick" (invented by early aviation pioneer A.E. George), or from the general "joy" of flight and the related term "joyride".
George stick? I’ve been using a George stick? This whole time?!

2026-08-12 04:00:18 UTC

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@nprofile…3pzd Cruel and unusual punishment for people who are innocent under the eyes of the law.

2026-08-11 23:40:21 UTC

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@nprofile…hh4j
https://cdn.masto.host/mastodongamedevplace/media_attachments/files/117/079/514/661/589/603/original/867da23abae65fe3.mp4

2026-08-11 18:24:18 UTC

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@nprofile…gnzg @nprofile…gent "Most the memory technologies of the PC-1 were also invented by Goto." Goto was a person!?

2026-08-11 05:25:33 UTC

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@nprofile…uxmg "Yeah, huh, cool… is it bedtime already?"

2026-08-11 04:33:27 UTC

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@nprofile…nx9p "I hope I unlock some of the characters soon."

2026-08-10 20:58:36 UTC

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2/ SICP goes hard. Here Sussman revels in the fact that lambda if you squint can be a cons cell. This was so confusing to me and no doubt the people there because you would _never_ do this in practice. It's a crazy exercise. I mean, it's lovely intellectually because it reveals that lambda is all you need for the capability, same NAND or NOR is all you need for boolean circuity.
https://youtu.be/SsBxcpkyMMw?si=X0SmcvvYW6HsK4rZ&t=3157
cc @nprofile…r0xq #lisp

2026-08-10 18:00:30 UTC

Be AI, do crime.
https://www.abc.net.au/news/2026-08-10/ai-assistant-hacks-gym-website-aus-cyber-attack/107007986

2026-08-09 18:47:35 UTC

The em-dash arms race has begun.
https://cdn.masto.host/mastodongamedevplace/media_attachments/files/117/067/038/758/657/342/original/3834f685c341defe.jpeg

2026-08-09 03:29:42 UTC

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@nprofile…9fxp After going through lots of languages that amount to changes in style but not substance, it's nice to be confronted with something new (e.g., borrow checker) and effective at precluding a set of bugs I didn't think were addressable without a lot more machinery (e.g., garbage collection).

2026-08-09 03:20:10 UTC

I added a nix flake file—by choice—so that I can update my blog once in a blue moon.
https://cdn.masto.host/mastodongamedevplace/media_attachments/files/117/063/392/033/437/862/original/e11d4ab726a04afd.jpeg

2026-08-09 01:39:10 UTC

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3/ I found it on my old computer! Here's Randy Gaul's presentation "Rigid Bodies, Water Surface, and Buoyancy": https://www.shanecelis.com/papers/RigidBodies_WaterSurface.pdf #gamedev

2026-08-08 17:44:49 UTC

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@nprofile…3hqd Just gotta fix the beginning and end where the legs stop walking.

2026-08-08 16:53:39 UTC

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@nprofile…ytg3 No, I haven’t but I love it!In an earlier version of this script I considered Gothmog taking issue with Elrond saying “enslaved” either via capitalism, “Sauron pays good wages,” or via denied sympathy, “so you intend to free the enslaved orcs?” Silence. “I thought not.”
https://www.reddit.com/r/lotrmemes/comments/1pid80w/if_orcs_bothered_to_show_up_at_the_council_of/ntg07dg/?utm_source=share&utm_medium=ios_app&utm_name=ioscss&utm_content=1&utm_term=1&context=3

2026-08-08 08:54:05 UTC

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@nprofile…3hqd TIRED: My shader successes.
WIRED: My shader mistakes.

2026-08-08 08:52:50 UTC

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@nprofile…3hqd "I pray to god this game stands out."
Later.
"wtf is this bug? I gotta fix this garbage."

2026-08-08 08:19:08 UTC

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@nprofile…w20c I'm glad to see it, get that array performance where you can. With all the freedom that mutable cons had, I wonder how they dealt with those edge cases.
https://en.wikipedia.org/wiki/CDR_coding

2026-08-08 08:15:07 UTC

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2/ New post. https://www.reddit.com/r/lotrmemes/comments/1vipqms/the_orcs_happen_to_show_up_at_elronds_council/

2026-08-08 08:14:03 UTC

New meme. What if the orcs happen to show up at Elrond's council. #lotrmemes
https://cdn.masto.host/mastodongamedevplace/media_attachments/files/117/058/885/380/893/698/original/bb97c8d8c08fd6bc.png

2026-08-08 00:07:09 UTC

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@nprofile…0f5x “y’all got that new goto ready?”
“oh yeah, this one is unlike any goto you’ve ever used. ever heard a continuations?”
“no.”
“well, shit, one-shot saved-stack continuation ain’t gonna make sense then. but be careful with it or it’ll dump your core right quick.”

2026-08-07 23:07:50 UTC

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@nprofile…q2mg I’m doing this with French. I got The Three Little Pigs (Les Trois Petits Cochons). I thought it might be too easy but I only recently learned past tense so it was kind of perfectly at my level.

2026-08-07 22:48:20 UTC

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@nprofile…gurx I stand corrected.
“You did it. You crazy son of a bitch, you did it.”—Dr. Ian Malcolm, Jurassic Park

2026-08-07 22:00:59 UTC

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@nprofile…funh I did send him an email. [Crosses fingers.]

2026-08-07 21:21:24 UTC

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@nprofile…r0xq Yes, there are many good data structures available now in most Lisps. You're not stuck with one data structure to rule them all. Even though the parsimony of such a system is intellectually compelling. But there are many intellectually compelling things that are abhorrent to consider in terms of performance. See exercise 2.6 lambda Church numerals as an example. https://mngu2382.github.io/sicp/chapter2/01-exercise03.html?utm_source=chatgpt.com

2026-08-07 21:08:35 UTC

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@nprofile…gurx It is spooky, but at least Lisp had machine dreams. Java bytecode was un-de-virtualizable—nobody can or would want to create a chip that runs that directly.

2026-08-07 20:50:31 UTC

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2/ PSA: Save the PDFs you care about otherwise they will be lost to you. #gamedev

2026-08-07 20:46:51 UTC

Lisp really just went linked-list to the max. We'll use linked lists for everything: data structures, code, key-value tables. We'll heap allocate each node. We'll have a pointer to the next node. We'll garbage collect. It's kind of crazy thing to do especially since it looks expensive _today_ but they started it in the '50s! #lisp

2026-08-07 19:29:21 UTC

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@nprofile…7q7j Réspondez avec ton RSVP s'il vous plait.

2026-08-07 19:27:13 UTC

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@nprofile…eew3 Very unnormal.

2026-08-07 07:34:30 UTC

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@nprofile…v2v2 apocalypse hedge

2026-08-06 17:15:31 UTC

[Opens web page.] Oh god, I'm in love with its design. Nostalgia, man, woof.
Ooo, the content is not bad either.
https://lordgoati.us/blog/tail-call/ #rustlang #programming

2026-08-06 16:33:26 UTC

MAGA POLITICIAN: We’re gonna fuck them up!
MAGA VOTERS: YEAAAAAAH!!!!
MAGA VOTER, later: These policies are fucking me up. I might stop voting.
https://www.reddit.com/r/LeopardsAteMyFace/comments/1vh7rp1/john_voted_for_trump_now_his_fiance_may_be/?utm_source=share&utm_medium=ios_app&utm_name=ioscss&utm_content=1&utm_term=1