What does this mean in export type

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#1

What does this mean? Because I saw this pretty much like in couple scripts.
export type Array = {[number] : T)
what does this ‘T’ means and why do they use <>

#2

I think you mean:

export type Array <T> = {[number] : T}

Is that correct?

#3

It’s type checking.

#4

Yup why does it use <> . Sorry for the late respond just checked devforum

#5

Basically, it’s a variable for types. Whatever gets put inside the <>, we substitute it into the type like it was a variable. If we assume that we required the script that exports the type, usage might look like:

local myTable : Array <string> = {
    "hello", -- ok because the type is string
    "bye", -- ok because the type is string
    4 -- not ok because the type isn't a string
}
local myTable2 : Array <number> = {
    5, -- ok because the type is a number
    20, -- ok because the type is also a number
    game -- not ok because the type isn't a number
}
#6

So type tbl = {} can only be used on that script but if I use export type tbl = {} it can be used by other script, yes? Well yeah from module.

#7

Yes, just don’t forget to use export.

#8

I think with export when i wanna use that in the server script or local, i just need like
Let’s say i do export type tbl = {}
local myVar : Module.tbl = {} right?