How come this table.remove line won't work?

table.remove(selection, Axe)

I made a table called selection and I have already inserted Axe into the table.

The error it says is

13:01:08.879 - Players.Player.Backpack.Script:12: bad argument #2 to 'remove' (number expected, got Object)

The function remove in the table library takes two arguments, an array and (optionally) an integer.

If just table.remove(table) is called, it will remove what ever is at the last index in that array. If you specify an integer, it will remove what ever is in the table at that index and shift everything else down.

But you are passing it an Object, which it doesn't accept as an argument type. Instead, we have to write a loop of some kind to find the Object in the array and retrieve its index:

function removeObject(array, object)
	local index
	for i, value in next, array do
		if object == value then
			index = i
		end
	end
	table.remove(array, index)
end

This function will remove the last occurrence of that exact object (won't delete a clone of the object).

table.remove does not work that way. table.remove removes the value at a specific position.

For example:

tableOfStuff = {"pos1", "pos2", "pos3", "pos4"}
table.remove(tableOfStuff, 2) -- will remove "pos2" from the table

To remove an object (Like your axe) you can do the following:

for i, object in pairs(selection) do
	if (object == Axe) then
		table.remove(selection, i)
		break -- add a break to only remove one object
	end
end

Wiki article