Sort a table a certain way

[BlueeStackz]

How would you sort Table2 to be like Table1?

local Table1 = {1,3,4,2,5}
local Table2 = {5,4,3,2,1} 

Change Table2 to {1, 3, 4, 2, 5}?

[AustnBlox (Austin)]

You would use table.sort() to achieve this.

[Dev_Peashie]

I dont understand the use of this, those numbers are keys? or are values?

Specifically for the tables you are showing… you could do something like this:

local Table1 = {1, 3, 4, 2, 5}
local Table2 = {5, 4, 3, 2, 1}

local tempTable = {}
for i, v in ipairs(Table1) do
	tempTable[v] = i
end

table.sort(Table2, function(a, b)
	return tempTable[a] < tempTable[b]
end)

warn(Table2)

This is the output of table2:

{
    [1] = 1,
    [2] = 3,
    [3] = 4,
    [4] = 2,
    [5] = 5
}

[NyrionDev (Nyrion)]

They don’t want the elements to be sorted(according to what they posted as examples) and you also don’t provide any further information about how they’re going to use table.sort.

[AustnBlox (Austin)]

You can just search ever other thread regarding the same question or look at the example @Dev_Peashie has displayed above.

[NyrionDev (Nyrion)]

The only use case I see for this is checking if 2 tables are equal(in the sense that they have the exact same elements or no) however even that won’t work if you try to directly compare the 2 tables(by doing Table1 == Table2) so I thought to write you a simple function for it:

local Table1 = {1,3,4,2,5}
local Table2 = {5,4,3,2,1}

--Receives two tables t1, t2 as input and returns if they have the same elements
function HaveSameElements(t1: {any}, t2: {any}): boolean
	--This line of code ensures we always copy the table with the least amount of elements
	if #t1 < #t2 then t1, t2 = t2, t1 end
	--Creates a copy of t2 so we don't accidently damage the data in the real table
	local t2Copy = {} 
	for i, v in pairs(t2) do t2Copy[i] = v end
	--Loops through all elements of t1
	for i, v in pairs(t1) do 
		--Searches for the first occurance in t2
		local index = table.find(t2Copy, v)
		--If it doesn't find one, the tables are not equal
		if not index then return false end 
		--If it does it removes it from t2
		table.remove(t2Copy, index)
	end
	--If t2 has no elements left, the tables are equal, else they aren't
	return (#t2Copy == 0)
end

print(HaveSameElements(Table1, Table2)) --true 

Note: this only works for arrays, not dictionaries