Get When Item is Added to a Table

[Wildcutepenguin (Wild)]

I’m wondering if there’s an event that fires when you use table.insert because I want to know when an item is added to a table. Does anyone know if it exists?

[Valkyrop (JustAGuy)]

Maybe these could help -

What's the table version of "ChildAdded"?

Just create a function that you call instead of table.insert. function addToInbox(message) table.insert(inbox, message) -- do extra stuff end If you’re into it, you could use a method on an Inbox class instead. In general, for code clarity I would recommend avoiding relying on metatable methods like __newindex. It makes it so that you can’t trust what basic Lua operators like t[k] = v will do, it’s a power that must be used with great care.

ChildAdded with Tables?

Hello, How would I use ChildAdded (or something of the sort) for tables? I’ve asked other people but they told me to use loops, which clogs and isn’t that good. (Example of a loop that I DON’T want to use due to it being a loop, laggy, etc.) local Table = {}; while wait() do if #Table then print(Table[#1] .." is a new value of our table."); end; end;

A way to detect rbx-script-signal for a table changing?

Is there a way to create a Table.ChildAdded and Table.ChildRemoved connection without using a loop? It would need to respond to table.insert and table.remove. All implementations of this don’t directly respond to that.

Is there a way to detect change in a table

I want to detect change in a table (like when something is added or changed) supaTable = { ToiletFlushed = false Poop = {} } supaTable.ToiletFlushed = true I don’t know how If you do please let me know Thanks

You prob would need to use Metatables

[nicemike40]

Can I ask why you want to do this?

Presumably, you’re the one adding things to the table, so you already know when something new is added!

(There are legit reasons to want this, but it’s not necessarily the best solution)

[Wildcutepenguin (Wild)]

Yeah, I’ve changed my mind, I’ve moved the entire thing to right after table.insert.

[PlotxyMaker145 (Topkatto)]

Instead, you can use an loop to detect changes if the last version of the table’s size is larger than the current table’s size, and do the function:

local update = {}
local table_ = {}

spawn(function()
	while wait() do
		update = table_
		if #update < #table_ then
			-- code
		end
	end
end)

[Ziffixture (Ziffix)]

Detecting changes in tables is never a necessity. Most solutions introduce unnecessary overhead. As @nicemike40 brilliant put, you control when things are added to a table. Instead of detecting change, run your code at the site of the change. If this is not suitable for your codebase, it’s likely the table in question bears significant value to a system, which is formally developed with an interface (APIs). That interface can run a custom event or registered callbacks at the site of change for you.

For example, in my monetization system, I have several facets for detecting the additions of game-passes and developer products from the around the codebase:

Internal site of change: