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
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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 ...
  • 31
0 votes
0 answers
42 views

Lua: print table at specific table depth

This is my custom function: ...
3 votes
1 answer
89 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. ...
0 votes
1 answer
840 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 ...
6 votes
2 answers
167 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 ...
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4 votes
1 answer
87 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 ...
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4 votes
2 answers
282 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 ...
  • 41
2 votes
0 answers
61 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 ...
  • 397
2 votes
0 answers
49 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 ...
  • 397
2 votes
0 answers
482 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 ...
  • 171
1 vote
0 answers
22 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 ...
  • 111
3 votes
1 answer
178 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 ...
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1 vote
0 answers
115 views

Improving a code design of simple game mod for better teamwork [closed]

I've made this module in Lua as a mod for Project Zomboid game. In future I will develop my mods in a small team (of 2-4 programmers). At this moment I have no experience in teamwork, because most of ...
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2 votes
1 answer
153 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. ...
  • 169
6 votes
1 answer
358 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; ...
3 votes
1 answer
305 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 ...
5 votes
1 answer
446 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? ...
  • 1,003
1 vote
1 answer
105 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 ...
  • 13
5 votes
1 answer
584 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
206 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- ...
  • 429
3 votes
1 answer
130 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 ...
  • 429
5 votes
1 answer
785 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
309 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 ...
  • 137
4 votes
1 answer
692 views

Wrapping an IntPtr in a Struct for safer Interop

Consider the following C#/C interop scenario: ...
  • 41
3 votes
2 answers
121 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 ...
  • 141
7 votes
2 answers
816 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 ...
  • 215
7 votes
2 answers
2k 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 ...
2 votes
0 answers
330 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: ...
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4 votes
2 answers
60 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: ...
1 vote
2 answers
427 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 ...
2 votes
1 answer
60 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 ...
6 votes
0 answers
118 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 ...
  • 61
8 votes
1 answer
224 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: ...
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. ...
  • 614
8 votes
3 answers
213 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: ...
  • 12.8k
0 votes
1 answer
303 views

Text based adventure game navigation

I have a problem with my code. I made so much code, and now I need to place ends, which I cannot figure out how to do because I need to line everything up and then place at least 5 or 6 ends in the ...
3 votes
2 answers
732 views

Random RPG Battle System in Lua

This is my battle system that I wrote in Lua. Bear with me on this one, this is my first real program that does something besides write hello world. If there is anything that I could have done ...
3 votes
1 answer
7k 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. ...
's user avatar
2 votes
1 answer
66 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'...
13 votes
1 answer
247 views

Implementing The Proper Undead's Cave Generator

I recently stumbled onto a very old article about procedural dungeon generation on this site. Unfortunately, the author did not provide any code, only a description of the algorithm he used. Wanting ...
  • 181
-2 votes
1 answer
632 views

Lua and complex numbers [closed]

I try to use complex numbers in a lua program. I need to parse a table of complex numbers printing side by side the name of the complex number and its value. Can't get through it : I don't ask how ...
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1 vote
2 answers
247 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 ...
  • 113
7 votes
1 answer
193 views

Lua/Love2D Resource Loader (Queue)

I made this resource queue in Love2D. ...
5 votes
0 answers
474 views

Lua implementation of a text-based spreadsheets editor

Disclaimer: While the code in this question looks extremely long, I'm really only interested in reviewing some small parts of it. While I would sure appreciate someone going crazy and reviewing it ...
4 votes
2 answers
464 views

Bus Announcement System in ROBLOX Lua

I got bored and decided to create a lua announcement system with the ROBLOX API. One part is the display code, and the other part is the announcement code. DISPLAY CODE ...
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6 votes
1 answer
2k views

Asynchronous request cloning using Lua + openresty

I'm working on a project to clone a subset of requests going to our production servers to one or more non-production endpoints. I opted to do this in Nginx and Lua because at the time, I could not ...
3 votes
1 answer
408 views

String tokenization and replacing a numbered field

I created various functions for string manipulation in Lua, where the strings are composed of tokens separated by an ASCII character (which may be the point, comma, semicolon etc.). One of these is ...
7 votes
2 answers
801 views

Sum-based sliding rate limiting with Redis and Lua

As I'm new to Redis, I would like to get a review / improvement suggestions from Redis / Lua experts on the following problem and the solution I have found so far. Problem The context is: an e-...
4 votes
1 answer
129 views

mIRC scripting like string token manipulation in Lua

I'm trying to reproduce in Lua the mIRC scripting manipulating tokens function: ...
5 votes
1 answer
2k views

Pong-like game built in Love2D

I just started learning programming in the past two or three months. I started with Python, and now I'm learning lua. I started game programming this week and this is a game I made with the Love2D ...
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