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✓ ANSWER ACCEPTED

How to sort a dictionary by value?

Asked 266 views1 answers

I have code like so, everything work, except for the fact that the table doesn't sort, which is obviously the most important part. Can anyone find out what wrong? I certainly can't, Any help would be much appreciated.

Yes the number I am sorting does get updated, I tried with both and it still return the same results...

local function SelectMap()
	local Votes = {{"BridgeBrigade", 0}, {"Map2", 0}}
	
	for _, Player in pairs(PlayersService:GetPlayers()) do
		if Player:FindFirstChild("Votes") then
			for Index, Value in pairs(Votes) do
				if Votes[Index][1] == Player.Votes.Map.Value then
					Votes[Index][2] = Votes[Index][2] + 1
				end
			end
		end
	end
	table.sort(Votes, function(A, B) --This isn't sorting...
		print(A[1], B[1])
		return A[2] < B[2]
	end)
	print(Votes[1][1])
end

[ UPDATE ]

So I just did some debug tests and apparently "Map2" is a nil value but the value in the same table isn't. That strange

AnonymousEdited

1 answer

✓ Accepted answer

There is no dictionary involved here. All of the tables you're using are lists.

I would recommend using dictionaries instead. Each Vote object should have a .Name instead of [1] and .Votes instead of [2]. It's much easier to read and understand that way, and less likely to make a mistake.

Your use of table.sort is correct.

Have you added debugging into the loop to see if there are any players with a "Vote" object and what in fact Player.Votes.Map.Value is?

What do you see if you print those things out? That's what I meant by debugging - if you actually debugged, you should have an idea what's right and what's wrong.

Tables

Lua has one form of compound-data-structure (a thing that has multiple pieces). That is called a table. There are two main ways to classify the way a table is used.

List

A list is an ordered collection of elements. There's a first thing: list[1], and a last thing: list[#list].

A list uses 1, 2, 3, ..., as its indices.

Dictionary

A dictionary is an unordered collection of elements, where each element is labelled by a key.

For example, a dictionary could have a dic.Name or dic["Name"] or dic[mypart].

A dictionary is a table that isn't a list.

AnonymousEdited Permalink

3 comments

0

I did debug it, and after alot of work I got it to work. Sorry, I kind of forgotten to post here, but what was that about the Dictionary? and making it easier to understand. Could you explain?

Anonymous#
0

Edited to add explanation

Anonymous#
0

Thanks :)

Anonymous#

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