Is there a way to reverse the order of a table?

[StarJ3M]

There’s nothing specific that I’m currently doing with this, but just out of curiosity, I’m wondering if they’re is a way to reverse the ordering of a tables items.

We have table.sort, but after using that function from the table library, I was wondering on if there was a way to reverse it like table.reverse or something like that.

[SelDraken]

Not that I know of, but here is something that might help you out.

function ReverseTable(myTable)
	if myTable and #myTable > 1 then
		local temp = nil
		for n = 1,math.floor(#myTable/2) do
			temp = myTable[n]
			myTable[n] = myTable[#myTable-(n-1)]
			myTable[#myTable-(n-1)] = temp
		end 
	end
end

[54pv]

@StarJ3M

There’s nothing specific that I’m currently doing with this, but just out of curiosity, I’m wondering if they’re is a way to reverse the ordering of a tables items.

We have table.sort , but after using that function from the table library, I was wondering on if there was a way to reverse it like table.reverse or something like that.

Yes, you can reverse the order of a Lua table using the table library’s table.sort function in combination with a custom comparison function.

local nums = {5, 2, 8, 1, 9}

table.sort(nums)

local function reverseSort(a, b)
  return a > b
end

table.sort(nums, reverseSort)

for i, num in ipairs(nums) do
  print(num)
end