im a stupid windows user and need help with luarocks

Basically im trying to install the package cjson with luarocks, running the following command:

`luarocks install lua-cjson CC=gcc LD=gcc`


It start compiling normally, but as it reaches cjson.dll it prints this error

gcc -shared -o cjson.dll lua_cjson.o strbuf.o fpconv.o C:/lua/bin/bin/../lib -lmsvcr80
C:/Program Files (x86)/gcc/mingw32/bin/../lib/gcc/i686-w64-mingw32/14.2.0/../../../../i686-w64-mingw32/bin/ld.exe: cannot find C:\lua\bin\..\lib: Permission denied
collect2.exe: error: ld returned 1 exit status

Error: Build error: Failed installing cjson.dll in C:\lua\bin\bin/../share/luarocks/rocks/lib/luarocks/rocks/lua-cjson/2.1.0.10-1/lib

Im sure the error lies in the LD of gcc, but ive never ran in to this problem. Im confused, can someone help, please?


https://redd.it/1i2am0f
@r_lua

Is there a lack of dark vsc themes?
https://redd.it/1i2a15u
@r_lua

Lua beginner tips.

So im starting to learn lua and i have a couple of things i wanna know

First of all can i use it on windows, i tried to install lua on my system couple of times and the system still dont recognise it (help me out in this matter)


Second thing if you have any recomendation to somewhere i can leaen from i would appreciate it (a youtuber or somthing)

https://redd.it/1i2m7y4
@r_lua

Openresty docker compose

How to install any module (Ex: resty.http,...) in docker compse?

https://redd.it/1i2talp
@r_lua

Can someone help me adding a cooldown bar connected to an action in a game, in a game/mod noscript?



https://redd.it/1i30wxw
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Import module to use in Lua interactive mode question

I am completely new to Lua. I want to use a lib call eff.lua. By following its instruction, I install this lib using $ luarocks --local install eff. It accomplished installation successfully.

Installing https://luarocks.org/eff-5.0-0.src.rock
eff 5.0-0 is now installed in /home/ubuntu/.luarocks (license: MIT)

However, when attempting to load/ import and use the module in interactive mode after executing the lua command, the lua interactive mode displays errors.

$ lua
Lua 5.1.5 Copyright (C) 1994-2012 Lua.org, PUC-Rio
> require "eff"
> local Write = inst()
stdin:1: attempt to call global 'inst' (a nil value)
stack traceback:
stdin:1: in main chunk
C: ?

I thought it is because the path problem in the first place. The require "eff" looks working. So I am confused.

How can I fix this error? Thanks.

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@r_lua

Improve skills

I want to improve my lua skills help me improve my skills on lua

https://redd.it/1i3cq0q
@r_lua

Alchemer Lua set url variable or custom variable

This is driving me crazy. Even with an if else statement I cannot figure out how to evaluate two variables and set one of them. Any help is greatly appreciated

This is what I have:

questionID = 111
-- Get the values from the URL and invite
urlval = urlvalue("reg") inviteval = 'invite("custom 5")'
-- Determine which value to use
if urlval ~= nil and urlval ~= ""then
value = urlval
elseif inviteval ~= nil and inviteval ~= "" then
value = inviteval
else
value = nil
-- Set the value for the question
if value ~= nil then setvalue(questionID, value)
end




https://redd.it/1i3fn4q
@r_lua

I dont understand io.read() or io.write()



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How to learn Lua

How to learn lua? i wanna learn it for roblox because i wanna make a game and i hope i success with that
if anyone can help i will be appreciated :)

https://redd.it/1i3qizq
@r_lua

Como colocar dierentes consequências em uma mesma condição (if) quando programo em lua?

Olá! Estou fazendo o que posso para aprender a programar usando lua. Nunca programei antes, mas espero que consiga adicionar essa habilidade ao meu portifólio de ferramentas, e quem sabe até fazer um joguinho no roblox com ela.

Enquanto fazia um código para praticar, me deparei com um problema: não consegui escrever várias consequências para um só if. Isso fez com que eu tivesse de extender um parágrafo a três. Isso foi feito para ser assim ou há alguma maneira de fazer em um só parágrafo?

if EFT == true then

HP = HP + 20

elseif TLT == true then

HP = HP + 5

elseif EFT == true if TLT == true then

HP = HP + 25

end

if EFT == true then

TTpoints = 10

elseif TLT == true then

TTpoints = 5

elseif EFT == true and TLT == true then

TTpoints = 10

end

if EFT == true then

XPproductionVR = 2

elseif TLT == true then

XPproductionVR = 8

elseif EFT == true and TLT == true then

XPproductionVR = 4

end

https://redd.it/1i403nr
@r_lua

Bug in Lua (Vsc)

https://redd.it/1i41xv1
@r_lua

How do I call a recursive function multiple times?

```
local pair = function(n)

return n * 2, math.floor(n / 3)

end



local get_id = function(n)

local r = {}



r.rec = function(n)

local a, b = pair(n)



if a == n or b == n then

return "reached" -- I will do stuff here once I figure out the problem

else

tree.rec(a)

tree.rec(b)

end

end



return tree.rec(1)

end



print(get_id(20))
```

I am trying to make a function that will recursively climb up the collatz conjecture tree checking every value for the number I entered "20". Basically, I want this to assign a unique number to every collatz tree number. My problem is that tree.rec(a) is always being called first and tree.rec(b) is never called in the function.

https://redd.it/1i4441m
@r_lua

OOP "static" functions – terminological confusion?

Hello! I dive into the world of going OOP in Lua.

I understand most about .__index, metatables, prototypes etc.

My question is methodological though about content of certain guides.

Many online guides to OOP (like this one) talk about "static" functions. However, if you have a class

-- Create the table for the class definition
local ExampleClass = {}
ExampleClass.index = ExampleClass

function ExampleClass.new(name)
local self = setmetatable({ name = name }, ExampleClass)
return self
end

function ExampleClass.static()
print("Inside Static Function")
end

function ExampleClass:method()
print(self.name .. "'s method.")
end

-- Prints "Inside Static Function"
ExampleClass.static() -- works as expected

local instance = ExampleClass.new('Named instance')
instance:method()
instance.static() -- unexpected/wrong???

-- Deleting self-referencing class index doesn't help:
ExampleClass.index = nil
ExampleClass.static() -- works as expected
instance.static() -- throws error (good!)
instance:method() -- ALSO throws error (bad!)

The issue here is that static function CAN be accessed from the instance while they shoudn't.

If I understand correctly, this is because "methods" live in class table, which is instance's metatable and referred whenever something is not declared in instance table. This makes it even worse: all the static properties are also accessible from instance. Thank's God they point to the same reference 😳.

Is there an established way to have "true" static functions in Lua? Or is this concept pretty much misused?

I know that Lua's OOP is often most-likely prototype based. But so is e.g. JS where still static is a static:

class Class {
constructor() {
this.prop = "";
}
static staticFunction() {
console.log("static");
}
methodFunction() {
console.log("method");
}
}

let instance = new Class();
Class.staticFunction(); // works
instance.methodFunction(); // works
instance.staticFunction(); // ERROR: not a function

https://redd.it/1i49gwm
@r_lua

Just started learning - could use some help explaining some things

I have little experience in languages like Python and Java but wanted to learn Lua to make Roblox noscripts along with 2D games. I want to start off by just learning Lua as a whole. I've been learning for the past 3 days now (7 hours coding, and about 2 hours watching videos). Something that I'm struggling to get is the for and repeat loop, along with tables.

for a for loop the only thing I can do/make is:

for i = 1, 10 do
print("Hi.")
end

for tables, I try to make word-guessing games, or guess the length of a word but always have issues calling it from the table

local words = {
    "Dog", "Wire", "Mountian", "Tree", "House", "Car", "Bike", "Plane", "Boat",
    "Train", "Donkey", "Cat", "Fish", "Bird", "Lion", "Tiger", "Bear", "Wolf", "Fox", "Rabbit", "Horse",
    "Cow", "Pig", "Sheep", "Goat", "Chicken", "Duck", "Goose", "Turkey", "Penguin", "Ostrich", "Eagle", "Hawk",
    "Falcon", "Owl", "Parrot", "Crow", "Raven", "Seagull", "Dove", "Sparrow", "Robin", "Bluejay", "Cardinal", "Woodpecker",
    "Hummingbird", "Swan", "Pelican", "Flamingo", "Stork", "Crane", "Heron", "Ibis", "Vulture", "Condor", "Albatross", "Puffin", "Pigeon", "Starling", "Nigger"
}

io.write("Select a letter: ")
local userLetter = io.read():upper()

local matchingWords = {}
for , word in ipairs(words) do
    if word:sub(1, 1) == userLetter then
        table.insert(matchingWords, word)
    end
end

if #matchingWords > 0 then
    print("Words starting with '" .. userLetter .. "':")
    for , word in ipairs(matchingWords) do
        print(word)
    end
else
    print("No words found starting with '" .. userLetter .. "'.")
end

https://redd.it/1i4bumn
@r_lua

Lua ressources for intermediate programmers

Hello,

I am a hobbyist programmer with an background in math and an interest in computer science.

I worked myself through "COMMON LISP: A Gentle Introduction to Symbolic Computation" which was great. The exercises were trickey but also great fun and I learned a lot .

Now I developed an interest in Lua and I am allmost through "Programming in Lua". It is a great book about lua, but not a programming course.

Can you recommand good didactic ressources about programming/computer science on an intermediate to advanced level, that use lua as an prgramming language?

So far I found

\- Lua programming gems

\- https://github.com/a327ex/blog/issues/30



That should keep me busy for a while, but I am wondering, if there are other interesting options.

Thanks in advance!

https://redd.it/1i4f9qy
@r_lua

What are things lua is missing or needs to change that you'd like to see?

Currently, I'm working on a small project that transpiles a custom version of lua's syntax to original lua. I plan to make an extension for it to use in my projects.

Here's an overview of it. This is what the transpiler sees in terms of types.

https://preview.redd.it/1x36nwz0tsde1.png?width=676&format=png&auto=webp&s=4feae0111a59867c9e896ced735cf700fe4e882f

Let me know, I'll gladly take suggestions! Specially on classes, I'm not sure how built in class would look.

https://redd.it/1i4eeq3
@r_lua

HI im trying to learn lua and im 12

im trying to learn lua and im 12 so do someone knows a free app to learn lua ?
thx !

https://redd.it/1i4iut6
@r_lua

A Hot Reloader Web Server made in Lua

https://github.com/OUIsolutions/yahr

https://redd.it/1i4kfzi
@r_lua

Terminal don't print anything of my lua code. Where did i go wrong?

Hi! I'm here again. I'm checking my learn on lua making a code. This code verify if talent (TLT) and efforce (EFT) are true, and then change the variables to make then have the same level, hp, and xp, even though they work by different ways. Buut, i guess something is wrong, since terminal don't print nothing. Someone can help me? Thanks for attention :)

HP = 0
XP = 0
LV = 0
EFT = false
TLT = true
TT = 0

if EFT == true then
HP = HP + 20
TTpoints = 10
XPproductionVR = 2
elseif TLT == true then
HP = HP + 5
TTpoints = 5
XPproductionVR = 8
elseif EFT == true and TLT == true then
HP = HP + 25
TTpoints = 10
XPproductionVR = 4
end

function TTproduction()
TT = TT + TTpoints
end
function XPproduction()
XP = TT * XPproductionVR
end

if TLT == true then
LevelUpVR1 = 20
LevelUpVR2 = 40
LevelUpVR3 = 60
elseif EFT == true then
LevelUpVR1 = 40
LevelUpVR2 = 80
LevelUpVR3 = 120
elseif TLT == true and EFT == true then
LevelUpVR1 = 40
LevelUpVR2 = 80
LevelUpVR3 = 120
end

if XP < LevelUpVR1 then
LV = 0
elseif XP >= LevelUpVR1 then
LV = 1
elseif XP >= LevelUpVR2 then
LV = 2
elseif XP == LevelUpVR3 then
LV = 3
end

while LV < 3 do
TTproduction()
XPproduction()
end

if LV == 0 then
HP = 5
elseif LV == 1 then
HP = 10
elseif LV == 2 then
HP = 20
elseif LV == 3 then
HP = 30
end

print(HP, XP, LV)

https://redd.it/1i4hiyk
@r_lua

What's the issue here?
https://redd.it/1i50v0y
@r_lua