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OpenCiv3: Open-source, cross-platform reimagining of Civilization III

https://openciv3.org/
631•klaussilveira•12h ago•187 comments

Start all of your commands with a comma

https://rhodesmill.org/brandon/2009/commands-with-comma/
19•theblazehen•2d ago•2 comments

The Waymo World Model

https://waymo.com/blog/2026/02/the-waymo-world-model-a-new-frontier-for-autonomous-driving-simula...
930•xnx•18h ago•547 comments

What Is Ruliology?

https://writings.stephenwolfram.com/2026/01/what-is-ruliology/
34•helloplanets•4d ago•26 comments

How we made geo joins 400× faster with H3 indexes

https://floedb.ai/blog/how-we-made-geo-joins-400-faster-with-h3-indexes
110•matheusalmeida•1d ago•28 comments

Unseen Footage of Atari Battlezone Arcade Cabinet Production

https://arcadeblogger.com/2026/02/02/unseen-footage-of-atari-battlezone-cabinet-production/
43•videotopia•4d ago•1 comments

Jeffrey Snover: "Welcome to the Room"

https://www.jsnover.com/blog/2026/02/01/welcome-to-the-room/
10•kaonwarb•3d ago•10 comments

Show HN: Look Ma, No Linux: Shell, App Installer, Vi, Cc on ESP32-S3 / BreezyBox

https://github.com/valdanylchuk/breezydemo
222•isitcontent•13h ago•25 comments

Monty: A minimal, secure Python interpreter written in Rust for use by AI

https://github.com/pydantic/monty
213•dmpetrov•13h ago•103 comments

Show HN: I spent 4 years building a UI design tool with only the features I use

https://vecti.com
323•vecti•15h ago•142 comments

Sheldon Brown's Bicycle Technical Info

https://www.sheldonbrown.com/
372•ostacke•19h ago•94 comments

Microsoft open-sources LiteBox, a security-focused library OS

https://github.com/microsoft/litebox
359•aktau•19h ago•181 comments

Hackers (1995) Animated Experience

https://hackers-1995.vercel.app/
478•todsacerdoti•21h ago•234 comments

Show HN: If you lose your memory, how to regain access to your computer?

https://eljojo.github.io/rememory/
275•eljojo•15h ago•164 comments

An Update on Heroku

https://www.heroku.com/blog/an-update-on-heroku/
404•lstoll•19h ago•273 comments

Dark Alley Mathematics

https://blog.szczepan.org/blog/three-points/
85•quibono•4d ago•21 comments

Delimited Continuations vs. Lwt for Threads

https://mirageos.org/blog/delimcc-vs-lwt
25•romes•4d ago•3 comments

PC Floppy Copy Protection: Vault Prolok

https://martypc.blogspot.com/2024/09/pc-floppy-copy-protection-vault-prolok.html
56•kmm•5d ago•3 comments

Vocal Guide – belt sing without killing yourself

https://jesperordrup.github.io/vocal-guide/
16•jesperordrup•3h ago•9 comments

How to effectively write quality code with AI

https://heidenstedt.org/posts/2026/how-to-effectively-write-quality-code-with-ai/
245•i5heu•16h ago•189 comments

Was Benoit Mandelbrot a hedgehog or a fox?

https://arxiv.org/abs/2602.01122
13•bikenaga•3d ago•2 comments

Introducing the Developer Knowledge API and MCP Server

https://developers.googleblog.com/introducing-the-developer-knowledge-api-and-mcp-server/
53•gfortaine•10h ago•22 comments

I spent 5 years in DevOps – Solutions engineering gave me what I was missing

https://infisical.com/blog/devops-to-solutions-engineering
141•vmatsiiako•18h ago•64 comments

Understanding Neural Network, Visually

https://visualrambling.space/neural-network/
281•surprisetalk•3d ago•37 comments

I now assume that all ads on Apple news are scams

https://kirkville.com/i-now-assume-that-all-ads-on-apple-news-are-scams/
1060•cdrnsf•22h ago•435 comments

Why I Joined OpenAI

https://www.brendangregg.com/blog/2026-02-07/why-i-joined-openai.html
133•SerCe•9h ago•118 comments

Learning from context is harder than we thought

https://hy.tencent.com/research/100025?langVersion=en
177•limoce•3d ago•96 comments

Show HN: R3forth, a ColorForth-inspired language with a tiny VM

https://github.com/phreda4/r3
70•phreda4•12h ago•14 comments

Female Asian Elephant Calf Born at the Smithsonian National Zoo

https://www.si.edu/newsdesk/releases/female-asian-elephant-calf-born-smithsonians-national-zoo-an...
28•gmays•8h ago•11 comments

FORTH? Really!?

https://rescrv.net/w/2026/02/06/associative
63•rescrv•20h ago•23 comments
Open in hackernews

Doo: A Simple, Fast Programming Language Built on Rust and LLVM

15•nynrathod•3mo ago
Hey HN!

https://github.com/nynrathod/doolang

I'm Nayan, and I'm stoked to share Doo, my project turned side hustle for a lang that's dead simple to write but punches like Rust. Think clean syntax (inspired by Rust but less boilerplate), auto memory mgmt via ref counting (no GC pauses), rich types, and it spits out standalone native bins via LLVM/clang.

Why Doo? Coding should feel fun, not fighty. No more wrestling with lifetimes or macros just to get a "hello world" but still safe and speedy.

Quick tour (hello.doo):

fn main() { let msg = "Hey HN!"; print(msg); }

Static Type System: Compile-time type checking with type inference Automatic Memory Management: Reference counting for data types Rich Data Types: Integers, strings, booleans, arrays, maps, and tuples Module System: Organize code with a hierarchical import system Control Flow: Conditional statements, for loops, and range iteration Function System: First-class functions with parameter and return type annotations Native Compilation: Compiles to standalone executables using clang/lld

Repo: https://github.com/nynrathod/doolang (stars/pulls welcome!)

What do you think? Too Rust-y? Missing a killer feature?

Comments

sim7c00•3mo ago
what are the kind of things you are building yourself with this?
nynrathod•3mo ago
Hi,

So main goal of this language is to have simplicity while writing code. Rust is great will dominate, but as dev who want speed and security but with high level syntax, doolang is best for them. Right now im working on std library and inbuilt function, and moving forward I will integrate doolang with my own note taking app uoozer note https://play.google.com/store/apps/details?id=com.uoozer.not... , 550+ test cases covered by doolang already with valgrind memroy test too.

so for roadmap, after inbuilt functions and standard library deployment will build http router and will test real world scenario for api dev. IF all well then will integrate with uoozer note.

pavelai•3mo ago
The idea and syntax looks good for me. I like it's clean an minimalistic design. But still it's to early to say is it good or not. Because there is no obvious features. You should answer the question what's the goal of the language and find the auditory who is right for you.

Did you write it or generate? If the later, then it's could be even more impressive in some way.

pavelai•3mo ago
I think there is a bit of a additional value here. It's very good as a learning project, like "how to make you own programming language and compile it into executable". Due to the simplicity and minimalism, it could be very useful.
nynrathod•3mo ago
Hi,

Yeah make sense, but I don't have any buzzing goal right now, doolang is not any dsl, just to ensure high level syntax for developer writing backend servers apis. And not started as learning project. Will move forward as per feedback of community and requirement but not such specific target im aiming. so again simple concept is keep it simple to write with speed and security

pavelai•3mo ago
I understand your intensions, but for compiled languages usually it takes years to be accepted by developers as a mature language. It is so even for Go and Rust. Both of them has giants behind them and, again, it took many years for them. As a solo developer you could make it more specific to become popular in some particular field and then to scale it. If the learning is too simple for you, then you can choose anything else. But if you wanna grow, turn it into product. If you want it to be more popular as a server side programming language you can add some language constructions to make it easy to write routers, parse requests data and react on it maybe with pattern matching. Hope this would help you to find your way to make it bigger. Good luck
nynrathod•3mo ago
True, it takes years. And as a solo dev its really hard. Turning into product really makes sense, i understood now i need something unique or specific feature. but as of now only writing apis routers and server with super simple syntax with speed and security only having in my mind. but I value your point, do you have any suggestions or recommendations? I'm also thinking to start new post to take ideas and suggestion from community.
Panzerschrek•3mo ago
Is it safe?

Does it require using traits everywhere, like Rust does?

Does it have proper references (C++ style)?

nynrathod•3mo ago
Saying safe will be too early, but design philosophy is no compromise with security and speed with easy syntax. It passed with 550+ test cases including unit test, memory stress, integration, circular dep, regresssion, valgrind memory leak, fuzz testing, also i added conservative limits max depth for recursion and data length for stability. Find here https://github.com/nynrathod/doolang/blob/main/src/limits.rs

Doolang not uses any traits like rust. Rust is great language, but its expose everything in syntax that is also great but as developer who want security+speed with fast development may found issue writing rust, that is main goal of doolang simlicity. I'm still figuring out further design principle of syntax to have less exposing syntax.

Doolang have auto memory management with reference counting. Just simple mut keyword introduced for mutating variable let mut data = "data"; no other syntax expose all handling automatic with rc and auto type define if not defined explicitly

Panzerschrek•3mo ago
When I say safety I mean inability of the programmer to trigger UB using normal language features, like it's impossible in Rust and several other (less known) languages. Does Doo support it? Or I just can shoot the leg and compiler lets me do this?

About references: am I correct, that any value is reference-counted and one can pass it to a function and mutate it (the original, not a copy).

nynrathod•3mo ago
Doolang aims for memory safety with static typing and automatic reference counting, so you won't see classic C/C++ bugs. But it does not claim Rust's level of safety there’s no formal guarantee that safe code can't cause undefined behavior. It's quite safe in practice, just not as strict as Rust.

For complex types (strings, arrays, maps), values are reference-counted and passed by reference. If you pass such a value to a function, you're sharing the same object—mutations affect the original. For primitives (Int, Bool), it's pass-by-value (copy).

Panzerschrek•3mo ago
So, what if I want to pass a value of a primitive type by-reference? How the equivalent code for the following C++ example looks like?

  void Foo( int& x )
  {
      x= 123;
  }
  
  void Bar()
  {
      int x= 0;
      Foo(x);
  }
nynrathod•3mo ago
Doolang currently does not allow you to mutate a primitive variable from another function.

Only support this as of now

fn Foo(x: Int) { x = 123; // Only modifies Foo's local copy print("inside Foo", x); // Print 123 } fn main() { let x: Int = 0; Foo(x); // x is still 0 here after Foo returns print("out x", x); // Print 0 }

nynrathod•3mo ago
But your points make sense, i should learn those UB works and will check how its behaving
paulf38•3mo ago
Nooooo! "valgrind memory leak". Aaargh. Valgrind (memcheck) is not just a leak detection tool. Leak detection is so unimportant that it isn't even turned on by default.
nynrathod•3mo ago
Thanks for pointing that out. I didn’t actually know all the details about how Valgrind works under the hood just that it does memory checking. I'll definitely read up more on it. If you have any good resources or tips, I'd appreciate your suggestions!
paulf38•2mo ago
I wrote a series of articles for ACCU overload back around 2012 to 2013. This was in 6 parts. Introduction https://accu.org/journals/overload/20/108/floyd_1930/ Basic memcheck https://accu.org/journals/overload/20/109/floyd_1913/ Advanced memcheck https://accu.org/journals/overload/20/110/floyd_1905/ Cachegrind and Callgrind https://accu.org/journals/overload/20/111/floyd_1886/ Massif https://accu.org/journals/overload/20/112/floyd_1884/ Helgrind and DRD https://accu.org/journals/overload/21/114/floyd_1867/

More recently I wrote another one DHAT https://accu.org/journals/overload/33/185/floyd/

The videos on YouTube are mostly crap. Here are a couple of good ones https://www.youtube.com/watch?v=-VDiEe9hxC4&lc=UgwLVU1SO1BUz... https://www.youtube.com/watch?v=y6AN0ks2q0A&lc=UgwQSQzkCtMRO...

nynrathod•2mo ago
THanks for sharing, will take a look surely, as memroy mgmt will be crucial for doolang. And I can see you are valgrind developer?
paulf38•2mo ago
I do most of the Valgrind maintenance these days.
glutamate•3mo ago
Algebraic data types please. When you programme in Haskell, you use them all time, and yet support is missing in so many languages. It's one of the things that makes Swift look attractive to me.
nynrathod•3mo ago
Hi, thanks for pointing this out. Yeah struct and enum are alredy in pipeline. memroy mgmt and codegen work pending for those 2. Planning to release in 0.3.0 but let me see if possible on next release of 0.2.0

Struct enums are base of any type safe language will surely add in upcoming releases.

cdata•3mo ago
Very cool. I'm always on the lookout for languages - especially beginner-friendly ones - that are good candidates for building Wasm Components (my use case is a fantasy console with Wasm game cartridges).

Have you given any thought to supporting Wasm Components as a build target?

nynrathod•3mo ago
Doolang i started for writing server and apis easily and simply, but you points make sense for Wasm components. Not planned as of now as this is just starting point, but surely would take you thought for my further roadmap. Honestly i'm not too much expert in such thing yet, but would appreciate if you have any other more recommendations and suggestions
preommr•3mo ago
Great start!

Just want to say, you did all the right things: Simple instructions, to the point and, and I can't stress this enough - examples. Like 9/10 when someone shares their language, they have little to no examples and it's the first thing people ask for.

I do think you could probably have a few more examples that are like the calculator and less of what's basically a one liner.

On the language: I like what's there so far. It's clean minimalist, and familiar.

The problem is that there's not really a USP that I can see. I get the rust but with reference counting, but I don't think that's even close to enough. There has to be a really really good reason for people to try and use a new programming language. And I don't really see the overall vision beyond a small hobby project (which is fine if that's what you were aiming for)

> Missing a killer feature?

Yes, very much so.

nynrathod•3mo ago
Thanks for valuable feedback. Yeah definitely will add more examples projects.

And really make sense your point to have usp or any unique or good feature doolang should have. As this is just starting point of doolang, and honestly i never started this as hobby project I want this to be mature over years not to replace any languge but to have simplicity for writing servers and apis. after few months I will definitely integrate this with my own production note taking app once i improve this language.

Reference counting i Introduce for auto memroy mgmt only, as rust ownership and borrow method will be extreme complex to implement as solo dev i feel.

But now im clear now language should have any special feature or target which is lacking, idk what to find for this, but it will be valuable if you can suggest, im also thinking to have new post to ask feedback from community what they want in such language. Any suggestion?

yencabulator•2mo ago

  > Doo provides a rich set of built-in types:
  >
  > Type  Description  Example
  > Int  32-bit signed integer  42, -10
  > Str  UTF-8 string  "Hello, World!"
  > Bool  Boolean value  true, false
32-bit signed integer is the only numeric type in that "rich" set?!?
nynrathod•2mo ago
Good point, will remove that word, btw will added unsigned float in upcoming release. Thanks for that comment.