🦒 Roblox Devs Wanted!

Hire, Sell, Collab & Build — All in One Fun Hub!
Join r/DevsRus today and let your games shine!

https://redd.it/1qxjbex
@r_lua

I need help please

I need the player collects 5 patient records scattered throughout the asylum, each a clickable object that disappears when picked up. A RecordsGui is displayed on the screen: first, the 'RecordsLabel' appears showing 'Records'; as each record is collected, the 'TotalRecordsLabel' updates in real time, counting up from '0 / 5' to '5 / 5', reflecting the player's progress. The GUI visually reacts to each pickup and changes the 1-5 number. I tried myself and with AI but it was no use. If someone can help me then I'm grateful!!!!

https://redd.it/1r07mru
@r_lua

I built a Lua/Luau-first transpiler with static analysis and no runtime helpers

I built Hordr, a Lua/Luau-first frontend transpiler.



It adds flow-sensitive analysis, explicit modules, a Luau-compatible type checker,

and safe optimizations, while generating clean, readable Lua with no runtime helpers

or semantic changes.



This is not a Lua replacement and not a new runtime.

It’s a conservative tooling layer for larger Lua codebases



Repo: https://github.com/Bladiostudio/Hordr

Feedback and criticism welcome.



https://redd.it/1r0lg7c
@r_lua

ECS like behavior with objects in Lua is possible?

Most of the time, it's considered that OOP has poor performance because of the way it works internally. Arrays and data make use of the CPU's cache memory while objects are scattared across the memory and in some instances, each object has it's own copy of a method from the constructor. But in Lua... I heard that if you write your classes correctly, the "methods" are cached. So, in the end, if you run for obj in objs do obj:something() end it's like you esentially iterate through tables of data and call the same referenced function on them, right?

So, in the context of LuaJIT, how accurate is this? As soon as I have time I'mma go benchmark this idea, but curious to learn more about that stuff. Thank you!

https://redd.it/1r4rdm5
@r_lua

Lua Script

I've used WatchMaker for some time until my Pixel 3 watch was not compatible. With the new and updated version, I find some of the menu noscripts don't transfer to my watch. Can someone help with these issues especially if I need to write my own noscript?

1. Ring corners stay round instead of converting to straight lines on the ends.

2. Rings won't show a gradient for the first two chosen colors

3. Even if I choose the noscript to show the phone battery level or percentage it reverts back to the watch battery.

Thanks!

https://redd.it/1r4mo83
@r_lua

Lua 5.5.0 - "for-loop variables are read only"

Currently working on integrating Lua 5.5.0 into [OneLuaPro](https://github.com/OneLuaPro). This new "[for-loop variables are read-only](https://www.lua.org/manual/5.5/readme.html#changes)" feature is really annoying, as it impacts a lot of existing code:

[C:\...\_IMPLEMENTED]> for /r %f in (*.lua) do @(C:\misc\OneLuaPro\build64\OneLuaPro-5.4.8.3-x64\bin\luac -p "%f" >nul 2>&1 || echo Lua 5.5 Problem in: %f)
Lua 5.5 Problem in: C:\misc\_IMPLEMENTED\ldoc\ldoc\html.lua
Lua 5.5 Problem in: C:\misc\_IMPLEMENTED\ldoc\ldoc\markdown.lua
Lua 5.5 Problem in: C:\misc\_IMPLEMENTED\ldoc\tests\mod1.lua
Lua 5.5 Problem in: C:\misc\_IMPLEMENTED\ldoc\tests\example\style\simple.lua
Lua 5.5 Problem in: C:\misc\_IMPLEMENTED\ldoc\tests\factory\factory.lua
Lua 5.5 Problem in: C:\misc\_IMPLEMENTED\lua-cjson\tests\bench.lua
Lua 5.5 Problem in: C:\misc\_IMPLEMENTED\lua-openssl\test\4.pkey.lua
Lua 5.5 Problem in: C:\misc\_IMPLEMENTED\luacheck\spec\samples\compound_operators.lua
Lua 5.5 Problem in: C:\misc\_IMPLEMENTED\luacheck\spec\samples\python_code.lua
Lua 5.5 Problem in: C:\misc\_IMPLEMENTED\luacheck\spec\samples\utf8_error.lua
Lua 5.5 Problem in: C:\misc\_IMPLEMENTED\luacheck\src\luacheck\standards.lua
Lua 5.5 Problem in: C:\misc\_IMPLEMENTED\luautf8\parseucd.lua
Lua 5.5 Problem in: C:\misc\_IMPLEMENTED\wxlua\wxLua\bindings\any-bind-sync.lua
Lua 5.5 Problem in: C:\misc\_IMPLEMENTED\wxlua\wxLua\bindings\genwxbind.lua
Lua 5.5 Problem in: C:\misc\_IMPLEMENTED\wxlua\wxLua\bindings\stc-bind-sync.lua
Lua 5.5 Problem in: C:\misc\_IMPLEMENTED\wxlua\wxLua\samples\editor.wx.lua
Lua 5.5 Problem in: C:\misc\_IMPLEMENTED\wxlua\wxLua\samples\wxluasudoku.wx.lua
Lua 5.5 Problem in: C:\misc\_IMPLEMENTED\ZeroBraneStudio\api\lua\corona.lua
Lua 5.5 Problem in: C:\misc\_IMPLEMENTED\ZeroBraneStudio\build\messages.lua
Lua 5.5 Problem in: C:\misc\_IMPLEMENTED\ZeroBraneStudio\lualibs\luadist.lua
Lua 5.5 Problem in: C:\misc\_IMPLEMENTED\ZeroBraneStudio\lualibs\dist\package.lua
Lua 5.5 Problem in: C:\misc\_IMPLEMENTED\ZeroBraneStudio\lualibs\luacheck\standards.lua
Lua 5.5 Problem in: C:\misc\_IMPLEMENTED\ZeroBraneStudio\lualibs\luainspect\init.lua
Lua 5.5 Problem in: C:\misc\_IMPLEMENTED\ZeroBraneStudio\src\util.lua
...

Am I actually the first person to discover this?

https://redd.it/1r3nhu5
@r_lua

Lua as the IR between AI and Spreadsheets

I've been building a spreadsheet engine in Rust (mlua), and I wanted to share a pattern that's been working surprisingly well: using Lua as the source of truth for AI-generated models.

**The problem**: When you ask an LLM to build a financial model in Excel, it's a black box. You get a .xlsx with hundreds of hidden dependencies. If a formula is wrong, you're hunting through cells. There's no diff, no code review, and no way to replay the construction.

What we do instead: In VisiGrid, AI agents don't touch cells. They write Lua noscripts that build the grid.

Claude generates this instead of a binary blob
set("A3", "Base Revenue")
set("B3", 100000)
set("A4", "Growth Rate")
set("B4", 0.05)

for i = 1, 12 do
local row = 6 + i
set("A" .. row, "Month " .. i)
set("B" .. row, i == 1
and "=B3"
or "=B" .. (row-1) .. "*(1+$B$4)")
set("C" .. row, "=SUM(B7:B" .. row .. ")")
end

set("A20", "Total")
set("B20", "=SUM(B7:B18)")
style("A20:C20", { bold = true })

Lua hit the sweet spot — simple enough that LLMs generate it reliably, sandboxable so agents can't escape, and deterministic enough to fingerprint (vgrid replay model.lua --verify — same noscript, same hash).

We tried JSON op-logs first and they were brittle the moment you needed any conditional logic. Lua lets the agent write actual loops and branches while keeping the output readable enough for a human to code review.

One thing I'm still working through: performance when mapping large grid ranges to Lua tables.

Right now sheet:get() on 50k rows is row-by-row across the FFI boundary. I've been considering passing ranges as userdata with \_\_index/\_\_newindex metamethods instead of materializing full tables.

Anyone have experience with high-volume data access patterns through mlua?

Curious what's worked for batching reads/writes without blowing up memory.

CLI is open source (AGPLv3): [https://github.com/VisiGrid/VisiGrid](https://github.com/VisiGrid/VisiGrid)

https://redd.it/1r42b9a
@r_lua

Luazen support for windows

Hey!

About this project: https://github.com/philanc/luazen/

I've been looking for some cryptography libs in lua and couldn't find many, except this one using ed25519 that worked really well on mac, but I can't get it to work on windows.

Has any one ever tried to port this to windows? I saw the issues with some attempts, just curious if anyone here tried too.

Or also, if there's any other lib that I could use, I'd be happy to change - but I couldn't find any

Thanks in advance

https://redd.it/1r3n3ah
@r_lua

how to learn

i’m a beginner to lua and coding in general and i want to learn how to code it, but i dont know where to start. all the youtube videos and tutorials i’ve watched so far haven’t helped, so i decided to come to the place of eternal wisdom: reddit. i primarily intend to use it for roblox game development. i just keep getting lost and feel like im going in circles and not actually learning anything. any advice?

https://redd.it/1r54c52
@r_lua

I come to seek for eternal wisdom from the great programmers. Also because I heard Polytoria uses Lua-
https://www.reddit.com/gallery/1r55m68

https://redd.it/1r563jp
@r_lua

Started 3 days ago and this recurssion is confusing
https://redd.it/1r2rzts
@r_lua

Lua 5.5 length operator now stricer than with Lua 5.4

While porting lua-cjson to Lua 5.5, I encountered a test case failure. It appears that Lua 5.5 handles table length evaluation more strictly than previous versions, especially regarding tables with holes:

C:\...\tests> lua -e "print(VERSION); t={nil,true}; print(#t)"
Lua 5.5
0

[C:\...\tests]> C:\Apps\OneLuaPro-5.4.8.3-x64\bin\lua.exe -e "print(VERSION); t={nil,true}; print(#t)"
Lua 5.4
2

Bug or feature? I've also posted this issue into the lua-l list.

https://redd.it/1r5c0l9
@r_lua

Lunar: a self-hosted Golang+Lua FaaS for personal use.
https://github.com/dimiro1/lunar

https://redd.it/1r5c4ny
@r_lua

Melhor IA para programar em LUA...

Opa! Alguém ai poderia me indicar uma IA, qualquer IA, que seja boa na programação LUA?

https://redd.it/1r5mqmi
@r_lua

I made a sandbox multiplayer game you can mod in lua

https://redd.it/1r5u1mp
@r_lua

Code lua

Bonjour, j'apprends le langage de programmation Lua. Je me lance de petits défis, et celui-ci consiste à déclencher une action : une explosion se produit lorsqu'on touche un élément. Je ne sais pas comment faire. Pourriez-vous m'aider ?

https://redd.it/1r6794d
@r_lua

Lilush (LuaJIT runtime & shell) first public release
https://redd.it/1r6o8t5
@r_lua

typing lua is way slower than my normal typing speed for some reason

been noscripting in lua for a while now (mainly roblox studio stuff) and just noticed my typing speed tanks whenever i'm actually coding vs just typing normal text

like i can do 75wpm easy on regular stuff but the moment i'm typing function(), end, pairs of brackets, table constructors with all the commas and colons... drops to like 45wpm. really annoying when you're trying to iterate fast or you're in the zone and your fingers are just lagging behind

found this site typequicker that has a lua practice mode where you can drill actual lua syntax. function declarations, table operations, all those symbols that mess up your flow. been running through it for like 15min before coding sessions

went from \~45wpm on lua code to like 70wpm in a few weeks which is kinda wild. now typing for k,v in pairs() or nested tables doesn't have that awkward stutter anymore

also shows which fingers are slow so you can focus on what's actually holding you back. my right pinky was terrible at brackets and parentheses lol

anyway if your typing feels like it's bottlenecking your lua workflow might be worth checking out. better than just grinding random words that don't help with actual syntax

https://redd.it/1r6x2g9
@r_lua

Any good tutorials for LÖVR 3d?

I'm a completely inexperienced programmer and I only recently learned to program in Lua. I was looking for a way to explore 3d and decided to learn LÖVR 3d. Is there a good source that introduces LÖVR for beginners?

https://redd.it/1r9u0w3
@r_lua

Lilush: The Next Small Thing
https://lilush.link/

https://redd.it/1r91jnd
@r_lua

Experimental Lua2C

I have been working on a project to turn simple lua code into actual working, compilable C code, and its working! (With static compilation if you have a C compiler, i guess)

It currently supports:
Variables with strings, integers, and floats
Variable manipulation with addition, subtraction, multiplication, and division
Functions with experimental arguments
And Print()

~~if this gets 20 upvotes ill make it open source~~ WE GOT 20 UPVOTES

# Source code: https://github.com/LuaToC/LuaToC

UPDATE 1: Added tables and loops, currently working on os since i want clock,
Update 2: Wait how are theese updates going so fast? Anyway, added experimental os and math libraries, their code inspired by luajit!
Update 3: Minor update, added assert(), optimized print() a bit, and fixed some memory leaks
Update 4: Fixed assert() lol, nearly halfed noscript size by cleaning up code (1700 lines > 900 lines), fixed more memory leaks

https://redd.it/1r8cwod
@r_lua