Variable number of argument to a function with ...

Hello,
I got this :

function type.Pos:load(data)
   print(data.x) -- Print the value correctly
   self:set(data)
end

who call this :

function type.Pos:set(...)
   local arg = {...}
   print(arg.x) -- print nothing
end

I don't understand why arg.x is nil.

Thanks for the help !

… is a strange operator that acts as a list of unpacked items, when you do {…} you pack all of the items into an array. In your first example data seems to be a table, and in your second example you try to access the previous data variable without accessing it first. Try this

local data = {...}
local X = data[1].x -- the [1] accesses the first argument

I'd like to add that Lua will automatically assign the variable "arg" to functions which use the … operator. This means that you can remove the line where you redeclare and reassign arg.

Thanks for the replies.
Why I don't use arg is because it seems to be deprected since lua 5.1 (source)

Incinirate, on 23 July 2016 - 05:50 PM said:

… is a strange operator that acts as a list of unpacked items, when you do {…} you pack all of the items into an array. In your first example data seems to be a table, and in your second example you try to access the previous data variable without accessing it first. Try this

local data = {...}
local X = data[1].x -- the [1] accesses the first argument

Thanks it worked !