Typechecking table

RaterixRGL · August 13, 2022, 10:28pm

I want to typecheck a table value collected from functions like GetChildren.

local Children:table = workspace:GetChildren()

Roblox says table is an invalid type, which is not true:

print(type({})) > table

Forummer · August 13, 2022, 10:32pm

You annotate a value’s type as table via a table constructor.

local t : {number} = {1, 2, 3} --Array of numbers.
local t2 : {[string] : boolean} = {Key1 = true, Key2 = false} --Dictionary containing string/boolean pairs.

RaterixRGL · August 13, 2022, 10:33pm

This does not denote dynamic GetChildren tables.

Katrist · August 13, 2022, 10:34pm

Wouldn’t it just be this?

local table: {Instance} = something:GetChildren()

Forummer · August 13, 2022, 10:34pm

GetChildren returns an array of instances.

local t : {Instance} = workspace:GetChildren()

RaterixRGL · August 13, 2022, 10:34pm

Is this not limited to a single instance?

Katrist · August 13, 2022, 10:36pm

Instance is the type for every child. You just have to put one class that every child may inherit.

RaterixRGL · August 13, 2022, 10:36pm

That makes sense, thank you for clarifying.