Lua is a powerful, fast, lightweight, embeddable scripting language. Lua combines simple procedural syntax with powerful data description constructs based on associative arrays and extensible semantics. Lua is dynamically typed, runs by interpreting bytecode for a register-based virtual ...

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1answer
33 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. ...
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1answer
26 views

Unexpected result when trying to optimize code

I'm writing a module to procedurally generate a map of islands. What it does is choosing for each chunk some points inside that chunk that work as the center of each island, then for each tile on the ...
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94 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 ...
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1answer
37 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 ...
1
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1answer
47 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 ...
6
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1answer
53 views

Lua/Love2D Resource Loader (Queue)

I made this resource queue in Love2D. ...
5
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0answers
61 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 ...
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2answers
36 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 ...
5
votes
1answer
254 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
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1answer
63 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
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2answers
158 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 ...
4
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1answer
53 views

mIRC scripting like string token manipulation in Lua

I'm trying to reproduce in Lua the mIRC scripting manipulating tokens function: ...
5
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1answer
224 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 ...
5
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1answer
45 views

Repetitive replacement for expressing fractions in LaTeX

I am converting natural math expressions with fractions to Latex code. What I have done seems to work on examples I've tested, but I'm not sure if the algorithm is safe. And maybe the string part ...
53
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0answers
1k 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 time ...
4
votes
1answer
162 views

Recursively delete empty folders in Lua

I have written a script that run in WingFTP Server which has a Lua scripting engine built in. The script recursively deletes empty folders except the specified root folder. ...
3
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2answers
1k views

Get file name with extension and get only extension

I have again 2 functions but this time they return either the full file name with extension or just the extension with a dot. Both actions are so similar that I just copy pasted the code from one and ...
5
votes
1answer
63 views

Return table value based on a primitive “priority queue”

I have 2 function in Lua, one to look if a key is present inside a provided table and if true then return the value, else return false. This lookup function is called by another function with a ...
3
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1answer
49 views

Form for choosing settings for a game

I've created a form to choose the settings. These settings are automatically saved in a file from the game client in this form: ...
4
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0answers
55 views

Entity component system Lua API

The destruction of the objects are handled by the garbage-collector metamethod. (Does this make sense? This means that an out-of-scope object will stay visible in game until garbage collection.) The ...
5
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1answer
237 views

Creating 2D vectors

I've made a little mechanism for creating 2-D vectors in Lua. Vectors have two components i and j, and support addition, dot ...
4
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1answer
54 views

Form for choosing settings

I've created a form to choose the settings: These settings are automatically saved in a file from the game client in this form: ...
3
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1answer
61 views

Tracking various stats on character development

The purpose of this code is to track player development on a Multi-User Dungeon I play. It allows saving multiple characters to the same database. It allows for updates on level, hour, tier, morts, ...
4
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1answer
248 views

Default value mechanism in Lua using metatables

I am writing a couple of functions accepting tables as input parameters. These tables constitute a range of options, which should either be given or inferred from default tables. Concrete use cases ...
5
votes
0answers
301 views

Parsing Lua 5.2 strings with patterns

I wrote some code to parse Lua 5.2 strings in Lua 5.1, using patterns. It's a bit too slow, but it works fine as far as I tested. ...
7
votes
2answers
153 views

Lua program to clean up phone numbers

How idiomatic is my code? Since Lua does not have classical inheritance such as in OO languages. Feedback on the test and implementation are both appreciated/welcomed. The rules are: If the phone ...
6
votes
1answer
138 views

String split and tables

I have a table structured like this: ...
4
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0answers
335 views

Write premake4.lua file that builds and links to static libraries using premake

I am trying to write a premake4.lua file that builds and links to static libraries using premake. library mbm was originally ...
10
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2answers
313 views

OpenGL text rendering library for Lua built on freetype-gl

FTGL wasn't making me happy, so I decided to try something else. This isn't completely finished; I plan to work more on layouts and alignment, and add a few other things. It should be far enough along ...
12
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1answer
145 views

Lua bindings for FTGL (FreeType font rendering in OpenGL)

I wrote some Lua bindings for FTGL's C API. This works well enough, but I ended up with lots of macros, one for each Lua function signature. For example, LUD_NUMBER_NUMBER_TO_NUMBER creates a Lua ...
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2answers
62 views

Some table_handling tools for lua

I'm writing some table.tools to make table handling a little easier for me. But I'm a beginner with Lua, so you might help me a bit, to make the code better. First of all I would like to get the best ...
18
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1answer
553 views

Tiny Lua library to get char pointer from string

Background I'm using Lua with luaglut to do some OpenGL stuff. The luaglut API is almost identical to the gl/glut C APIs. Sometimes, gl functions want a pointer to some data, for example: ...
5
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0answers
117 views

Pong game built on a minimal entity component system

This simple game is built on the ECS described here: Minimal entity component system, take 2 ...
5
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1answer
137 views

Minimal entity component system, take 2

Here's a followup to Minimal entity component system. Please see that question for background. ...
4
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0answers
105 views

Minimal entity component system

I was trying to figure out what a minimal ECS might look like in Lua; here's what I came up with. This is based very loosely on darkf/microecs. ...
6
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1answer
494 views

Parsing Valve Key-Value files

Introduction Valve recently launched the Dota 2 Workshop Tools, which allows players to create their own maps with custom gamemodes, similar to Warcraft 3 in capabilities. Ability and unit ...
7
votes
1answer
170 views

Adding Abilities to Cards Dynamically in a Trading Card Game

I have figured out how to pass functions around in Lua, and I am using the technique of inserting functions into tables in order to dynamically assign functions to the cards in a trading card game. ...
4
votes
1answer
296 views

Return one particular element first, when iterating a lua table

I wish to iterate through a Lua table, but want to get one particular element first always (its key is known beforehand). Since the pairs function does not guarantee the order of a table's elements, ...
7
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1answer
145 views

Scripts loading Scripts Dynamically in Lua

I have been working with Lua lately and I have discovered that it is capable of doing some very interesting things. I have created a proof of concept that allows one Lua script to load another Lua ...
9
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1answer
118 views

Basic Game Model in Scripting Language

I've been working with Lua for a little bit, and I have finally come up with some code that can be extended to create the core of a game model. I come from an object oriented background, so working ...
5
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0answers
113 views

Fowler–Noll–Vo hash function in Lua

I recently coded this FNV-1a hash function in Lua. Are there any apparent performance improvements that could be implemented? ...
8
votes
1answer
284 views

Loading and Using Lua Scripts

I have been experimenting with integrating Lua into Objective-C. I have tried to do the bare minimum to get Lua to compute values and return them. I did not want to use any external libraries so I ...
6
votes
1answer
56 views

Converting the integers to their equivalent string representations

I have the following function which converts an integer (such as 103) to its string representation ("one hundred three"): ...
8
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2answers
142 views

Lua Formula Code

A friend of mine dabbles in lua, and he recently sent me a code which applies an equation we were discussing. I personally am very mediocre with lua, but my Python senses are tingling - I feel as ...
8
votes
2answers
384 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 ...
9
votes
1answer
276 views

Garry's Mod custom spectate player

I have been making my own scoreboard, and needed a custom spectate function for it, so I made this: ...
14
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1answer
221 views

Runtime expression autocompletion

I've written a function that can be used at runtime to suggest how the provided incomplete Lua expression can be completed so that it would make sense (that is, it would evaluate to a non-nil value). ...
4
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0answers
159 views

Can this “syntax sweetener” be improved?

I have a Lua project that uses some syntax sugar described in DecoratorsAndDocstrings, near the bottom of the page. It looks like this: ...
5
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0answers
68 views

Copying folder contents from several folders

I have a file directory which contains folders for every month, and within those folders are several text files. In this context I would like to copy all of the text files from my ...
2
votes
1answer
198 views

Calculating the Hamming distance

That's an easy one. I just want to calculate the Hamming distance between two strings. ...