Is it possible to use a table in a Touched event?

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#1

I want to be able to fire an event if any parts in a table are touched, can this be done?

How to add custom event to tables?
#2

No, you would need to iterate over the table and attach to each individual Touched event:

for _,v in pairs(instances) do
   v.Touched:Connect(functionGoesHere)
end
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#3

Is this correct?

local WaterWL   = workspace.Water:GetChildren()

for _,v in pairs(WaterWL) do
   v.Touched:Connect(function()
	print("Water was touched")


    end)
end

If it is, it doesnt seem to work.

#4

That code is correct, so there must be something wrong with your instance setup then.

#5

From an efficiency standpoint, does it make a difference if he repeats the whole function multiple times rather than stating the function once before the loop and referencing it in the connection?

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#6

Yes, a new closure wouldn’t be made every iteration and the function wouldn’t have access to the part that was touched, only the event arguments.

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#7

It depends on whether you need a closure or not (i.e. if there are variables inside the for-loop that you need to access, such as “v”). As far as I know it’s not too inefficient either way since you just get the variables in the closure as extra data, the whole function isn’t encoded multiple times in memory or anything I think.

It would probably be better to extract it as a separate function. But the poster seems like he first needs to understand the basics of what is happening.

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#8

In the way that you worded it explicitly, no you cannot - you must iterate over the objects and handle them individually. On the other hand though, you could do something like it. Tada, CollectionService. Write a handler for a specific tag (InstanceAdded and/or GetTagged). From there, just iterate over your objects and add the tag to them. Works like a charm so long as you account for tags right.

CollectionService:GetInstanceAddedSignal("WatchBrick"):Connect(function (AddedInstance)
    -- stuff
end)

for index, value in ipairs(wherever) do
    CollectionService:AddTag(value, "WatchBrick")
end
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