How to sort players by their numbered rank in a survival round?

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#1

I am making a leaderboard system where it sorts a player’s rank based on how long they survived in the round they played in. I can already set the player’s rank but it is set as a value in a dictionary table under the player.

So here’s the question: How do I sort a table based off a player’s rank. Sorry for not understanding much table terminology

Basically I want to go from this…

local leaderboardList = {
[player1] =  3,
[player2] =  1,
[player3] =  2
}

to this

-- The rank is the first value in each player, and I want to sort the 'leaderboardList' table like this
local leaderboardList = {
[player2] =  1,
[player3] =  2,
[player1] =  3
}

If you can help, please reply!

3 Likes
#2

You can use table.sort to sort this table.

table.sort(leaderboardList, function(elementA, elementB)
    --the elements are the values of the keys. We can compare them to sort the table.
    return elementA > elementB
end)
2 Likes
#3

Just to put a resource link How to use table.sort? methods the same thing that the fellow above me stated and has examples that might prove useful

#4

fyi, you cannot sort dictionaries. You would have to use arrays:

local leaderboardList = {
    {
        Player = player1,
        Points = 3
    }
}

table.sort(leaderboardList, function(a, b)
    return a.Points > b.Points
end)
#5

I just tested sorting a dictionary and it worked fine…

edit: 5th test in and the larger sample size worked. this is a smaller sample size

image
image735×201 13.4 KB

seems like the keys in the dictionary get re-arranged

#6

No it doesn’t, dictionaries don’t have orders. Your sample size is most likely very small and your prints are coincidentally in the right order.

#7

I made sure my items were in the complete wrong order. I don’t understand why it would only work for smaller dictionaries and not larger ones.

#8

It doesn’t. Run this code and you’ll see the behavior:

--!strict

local function generateRandomDictionary(count: number): {[string]: number}
	local dictionary: {[string]: number} = {}
	
	for i: number = 1, count do
		dictionary[tostring(i)] = math.random(1, 100)
	end
	
	return dictionary
end

local randomDictionary: {[string]: number} = generateRandomDictionary(100)

-- this will typecheck error as it is expecting an array
table.sort(randomDictionary, function(a: number, b: number): boolean
	return a > b
end)

for index: string, value: number in randomDictionary do
	print(index, value)
end