How to get `FindFirstChild` to silence the typechecker?

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1

Say I have some folder with BoolValues.

If I do:

folder["Name"].Value = true

then this will give me a warning.

But even if I do

if folder:FindFirstChild("Name") then
    folder["Name"].Value = true
end

It’ll still warn me about dynamically accessing the folder. How can I tell it to bugger off?

2

That said, if I do:

(folder :: any)["Name"].Value

It works fine, but I lose out on autocomplete :frowning:

3

just do (folder[“Name”]::InstanceTypeHere).Value
Wait hold on a minute…
Pal wth are you doing?

local ins = folder:FindFirstChild("Name")
if ins then
(ins::BoolValue).Value = true
end

Obviously typecheck freaked out
Becouse its problem in your code itself
You were indexing property of an instance and not its descedant.

1 Like
4

aw man, so I have to use findfirstchild() outside of the if statement?

6

yes
It has similar behavior to __index metamethod
If it doesnt find a property then it will try finding a child
Not sure about some cryptically named roblox security properties will it try to index them or not.

1 Like
7

No, it’s just better practice to use the returned value of FindFirstChild().