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Questions tagged [lua]

For code written in Lua, or built to interface with Lua (e.g. native code providing Lua functions).

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3 votes
1 answer
37 views

Run UNIT TEST automatically from NeoVim

Still working on my neovim configuration. I use Google test to write my unit tests. Which means that all the unit test begin with ...
3 votes
0 answers
20 views

Add DAP debugging to NeoVim on Mac

Upgrading from vim to neovim (on the mac). Part of this is to get the DAP debugger working from inside neovim. I have "Lazy&...
3 votes
1 answer
56 views

RandomNumber wrapper in Lua

This is a wrapper I wrote for math.random(). I have a larger program that will create a JSON file to 'load' from when I want to resume. However my program heavily ...
6 votes
1 answer
292 views

Complex number class in Lua

This is my first attemp with Lua. I decided to create this class, because it have lots of "tweaks" and "tricks". I want to know if I did it as best practices Lua ways. My Lua ...
0 votes
2 answers
67 views

Try to not repeat function in Lua

There is a way to not rewrite the same part (the cycle for i = 1...end) twice? ...
7 votes
1 answer
1k views

Very basic chatbot

Was the best way to implent this? For example it will only say "It's nice I know." If you first ask "hat" and then answer "yes". This is how I'm thinking: ...
0 votes
0 answers
78 views

Pandoc Lua filter to prefix absolute paths of links and images

I rewrote one of my Pandoc filters (initially written in Haskell, then Python) as a Lua Pandoc filter. I'd be happy to receive feedback on how this filter could be improved, especially in regards to ...
1 vote
2 answers
244 views

function to print any type in Lua?

I'm learning Lua for about a week now and I've built (I hope) a function to print any type in Lua. As I'm new to Lua I don't quite understand: if there is a more succinct way to achieve this if ...
4 votes
1 answer
3k views

Inverting a boolean in Lua

Is there a more elegant way to set this boolean value? SetScript() is a game API, while "OnClick" is its handler. What ...
8 votes
2 answers
283 views

3D torus in Lua

I'm a total beginoob in Lua. The aim is to display a 3D Torus in dots (see Figure1), or at least compute the positions, privileging clarity over performance. Pseudocode link. Don't hesitate to be ...
0 votes
2 answers
5k views

Get list of buffers from current neovim instance

The function below is written in Lua and returns the list of buffers from the current neovim session, it also allows the option to specify a optional table (object) as a parameter, with a ...
4 votes
0 answers
212 views

First Lua program - Print external IP and VPN status

I started learning Lua yesterday and wanted to write a quick program as a practice. It queries an external service for the IP address and country code, and naively check for the existence of network ...
11 votes
2 answers
1k views

Call a lua function - the C++ way

I'm not that good when it comes to templates, especially when it comes to variadic templates. I want to show you some code where I use both - templates and variadic templates - to call a lua function. ...
3 votes
1 answer
101 views

Trailing delimiter string splicing, implemented for Lua in C

I've been writing with C for a couple days, so this is a relatively advanced function compared to the simple things I've been doing previously. It's written for the Lua API, but it's still C. ...
3 votes
1 answer
10k views

Simple four-operation calculator in Lua

I'm a beginner at Lua and programming in general and I just made a simple calculator and I was wondering where I could make improvements. ...
4 votes
2 answers
622 views

I wrote my first pathfinding algorithm

I'm currently writing a small game in Lua, using the Love2d framework. I guess I'm doing it as a practice of sorts, but it did give me the opportunity to write my first pathfinding algorithm. I wrote ...
4 votes
2 answers
109 views

Suffixing numeric values

This is a part of my Factorio mod Visual Signals. This code takes a numeric value as input and returns a string for the value, for example: ...
7 votes
2 answers
1k views

Shutdown-Script for Don't Starve Together Dedicated Server

I have written my first LUA-Script/Function to shut down the Dedicated Server for Don't Starve Together. I wanted to shut down the server in 2 minutes and inform everyone on the server that the server ...
85 votes
1 answer
4k views

Siamese neural network

I have been studying the architecture of the Siamese neural network introduced by Yann LeCun and his colleagues in 1994 for the recognition of signatures ("Signature verification using a Siamese ...
2 votes
0 answers
64 views

Hairy collision code

I have a lot of nested for loops is there a better way to organize this code? Also the way I add and remove enemies and lazers seems like a bad implementation. I set the index of the table to nil ...
2 votes
0 answers
51 views

Tile editor with increasing number of features

I've made a very simple tile editor. I'd like for someone to review my code and tell me what I could improve on. For example I'm bad at input management and creating systems that work nicely. Say I ...
2 votes
0 answers
709 views

Forum web scraper in Lua

I've written a short web scraper in Lua (run in LuaJIT for speed) to download every post from a specific forum (not general purpose... yet). It takes about 12 hours to run and download 500,000 posts ...
1 vote
0 answers
27 views

Processing commandline arguments [closed]

I'm parsing commandline arguments in lua with a command parser library (penlight lapp). This works fine, is easy to design and flexible enough for me. However, now ...
3 votes
1 answer
235 views

Censoring words in lua

(repost: https://stackoverflow.com/questions/59665338/censoring-words-in-lua#comment105491094_59665338, as advised) Im currently making a discord censor bot for my friend, and I was wondering if ...
4 votes
1 answer
1k views

Elevator code for a game called ROBLOX

Are there any ways I could improve speed and less code? The elevator that uses this script works fine. Could anything be better? ...
2 votes
1 answer
222 views

Convert an integer to 4 bytes without bitshift operators

This code is applicable to either GLSL or C due to virtually identical syntax. Before GLSL 1.3, bitshift operators were not present and I am aiming for backwards compatibility to GLSL 1.2. ...
3 votes
1 answer
415 views

Finite state machine for chasing and attacking a target

My questions are: How can I improve my implementation of the FSM model? Should Finite State Machines have functionality for Adding and Removing states from table? (Since I can only be in one state at ...
6 votes
1 answer
634 views

Currying in Lua

Just whipped up this quick curry function in Lua, as a building block for partial application and memoization. Any feedback is appreciated. It takes two arguments; ...
5 votes
1 answer
523 views

Recursive descent parser for simple arithmetic expressions grammar

What I'd like to see in your review, in order of relevance: Is there any bugs? (I see none, but...) Is the code efficient? (by whatever metric you'd like to use) Is the code easy to understand? ...
8 votes
1 answer
235 views

Hash-optimization and Wilson-maze generation algorithm

I've finished optimization of Wilson algorithm (maze generation) from "silly and slow" algorithm of choosing unvisited cells: ...
1 vote
1 answer
119 views

Building a 64 × 64 particle accelerator frame in Minecraft with a computercraft turtle

I dont think this will work anywhere besides in minecraft with computercraft but it's all correct syntax. I just feel like it has some lines of code I could eliminated somehow and made it a cleaner ...
5 votes
1 answer
777 views

Collision detection for moving 2D objects

After implementing SAT (separating axis theorem) and not being happy with it only working on stationary shapes, this in theory allowing for fast objects to glitch through others, I came up with this ...
2 votes
1 answer
365 views

Faster way of converting a 1-d table to predefined userdata in Lua

I have defined a userdata in Lua (Lua version is 5.1) as shown below- ...
3 votes
1 answer
162 views

Serializing a table for filing

I have a table in Lua, which contains two 1-dimensional arrays in which each array contains approximately 800,000 elements. I want to serialize this Lua table to file efficiently. Hence, I planned to ...
5 votes
1 answer
1k views

Basic input validation package in Lua

I'm very new to Lua (and programming in general). I wanted to start out with a simple package that validates input based on a set of rules. The code works as intended, but is what I have written is ...
4 votes
1 answer
372 views

Simple terminal-based Lua task-tracking/calendar

I am learning Lua and wrote this little calendar/time-tracking script. It allows me to create tasks to do with a deadline, print them, and mark them as being done. A task is a table with the following ...
4 votes
1 answer
992 views

Wrapping an IntPtr in a Struct for safer Interop

Consider the following C#/C interop scenario: ...
7 votes
2 answers
3k views

Convert Lua UINT to hh:mm:ss

I have found the convert_to function in the lua-user wiki, and I created the convert_to_time function which does what I want it to do. Which is, basically: Having a number, return its value in a Time ...
3 votes
2 answers
155 views

Generating a Lua script for a tile map maker

I'm using printwriter to generate a LUA script for a tile map maker. It seems hackish to me, but it works. Purposes are for allowing users to make their own maps for my game. Is there a better ...
8 votes
3 answers
249 views

print(fizz..buzz)

I couldn't help but notice we didn't have a FizzBuzz in lua yet. I've always wanted to take a shot at Lua, so here goes nothing. Code: ...
2 votes
0 answers
386 views

Redis lua - game leaderboard "overview"

Here is the code I invoke as Lua script in Redis. I use Redis sorted set to store game scores. This function is used to get some kind of overview of leaderboard. It returns id, score and rank of: ...
6 votes
1 answer
281 views

Iterating over JSON docs

This Lua code runs in redis. It iterates over some JSON docs, and applies some logic based on the user (if any) making the request. I'm sure there's a lot I can improve here. ...
2 votes
1 answer
63 views

Load/save plain PPMs without error checking

I'm learning Lua. I decided to make a simple plain PPM decoder/encoder without error checks to familiarize myself with the language. I would appreciate any feedback on how could I make the following ...
1 vote
2 answers
435 views

Pico-8 player and scene

I recently started learning Lua by programming games in Pico-8. It's been fun, but it's time to learn some of the more powerful utilities to get things done smarter and with less redundancy. I'm an ...
6 votes
0 answers
139 views

brainF*** interperter in lua

For a personal project I may need to load and execute something that will basically be a very simple programming language. Though I am not at all close to this part of the project yet and I can most ...
8 votes
2 answers
429 views

Performing non-production analytics on data

I have the following Lua script which I use against my redis environment to perform some non-production analytics on my data. My dataset contains hundreds of millions of records, hence I want to make ...
11 votes
1 answer
2k views

Redis rate limiting in Lua

I've implemented a rate limiter for redis in Lua, and I'm wondering if anyone has any suggestions that might improve the performance. An example use: ...
2 votes
1 answer
73 views

Module to procedurally generate a map of islands

It chooses for each chunk some points inside that chunk that work as the center of each island. Then for each tile on the map it calculates the distance from the points in the 9 chunks around the tile'...
1 vote
2 answers
295 views

Simple maze game with four rooms

I'm starting to learn Lua and in one part of the book I need to convert a "Maze Game" that uses goto to another one that doesn't use ...
7 votes
1 answer
205 views

Lua/Love2D Resource Loader (Queue)

I made this resource queue in Love2D. ...