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 ...
-3
votes
1answer
33 views
Lua and complex numbers [on hold]
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
vote
1answer
42 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
votes
1answer
49 views
5
votes
0answers
59 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
2answers
35 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
231 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
1answer
60 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
2answers
154 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
votes
1answer
52 views
mIRC scripting like string token manipulation in Lua
I'm trying to reproduce in Lua the mIRC scripting manipulating tokens function:
...
5
votes
1answer
206 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
votes
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 ...
49
votes
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
151 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
votes
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
61 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
votes
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
votes
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
votes
1answer
208 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
votes
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
votes
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
votes
1answer
239 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
291 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
145 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
4
votes
0answers
319 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
votes
2answers
306 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 ...
11
votes
1answer
144 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 ...
7
votes
2answers
61 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
votes
1answer
547 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
votes
0answers
116 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
votes
1answer
133 views
Minimal entity component system, take 2
Here's a followup to Minimal entity component system. Please see that question for background.
...
4
votes
0answers
104 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
votes
1answer
479 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
166 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
287 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
votes
1answer
143 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
votes
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
votes
0answers
107 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
281 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
votes
2answers
141 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
273 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
votes
1answer
219 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
votes
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
votes
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
192 views
Calculating the Hamming distance
That's an easy one. I just want to calculate the Hamming distance between two strings.
...
8
votes
0answers
731 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:
...
6
votes
2answers
1k views
Lua string parsing
The following code takes a string and converts it to it's number equivalent.
A=1 ... Z=26, while keeping all other characters intact.
It formats the string using two delimiters. One for between ...
4
votes
1answer
370 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?
...
