How to Decoding and Reading JSON?
So I have been looking at the tutorials on the wiki but I cannot seem to understand how to use JSON. I have this based off of the tutorials:
game.Players.PlayerRemoving:connect(function(playerL)
if playerL:WaitForDataReady() then
local xp = playerL.xp
local kills = playerL.kills
local deaths = playerL.deaths
local cash = playerL.cash
local data = {
xp = playerL.xp,
kills = playerL.kills,
deaths = playerL.deaths
cash = playerL.cash,
name = playerL.userID
}
local RbxUtility = LoadLibrary("RbxUtility")
player:SaveString('data', RbxUtility.EncodeJSON(data))
end
end
end)
I am not exactly sure if it works because I have not been able to test it yet (haven't gotten to it), but assuming this works, how would I decode, because if I am correct JSON decodes into a table, but how would I pick out the info from the table? This is what I have but it is incomplete:
game.Players.PlayerAdded:connect(function(player)
if player:WaitForDataReady() then
local RbxUtility = LoadLibrary("RbxUtility")
player:LoadString('data', RbxUtility.DecodeJSON(data))
player.xp = xp
end
end
end)
EDIT: The reason I am using JSON is because I don't want to have to worry about the Data Limit later on as much. Is this a valid reason, like should I be worried or should I use a different way?
EDIT (again): I looked over this again, and did some more research and I still don't really understand.
1 answer
Use HTTPService as it officially as two functions for JSON.
First we should get the HTTPService
local http = game:GetService("HttpService")
What is JSON?
JSON is short for JavaScript Object Notation,and is a way to store information in an organized manner instead of loads of variables.
In javascript this is how we would display a JSON array
var Me = { "age" : "14", "gender" : "male" };
Please note that an Array is like a dictionary. It has a key and a value In lua the table would look like this
local Me = {["age"]=14,["gender"]="male"}
We can convert them to a string in the form of a JSON array or we can convert the string into a lua array.
http:JSONEncode([Table/Variant Input?])
This Encodes a table into a string
local jsonstringraw=http:JSONEncode(Me) print(jsonstringraw)
{"gender":"male","age":14}
As you can see it looks like the JSON array above, of course on a single line this time.
We can wrap the string back into a table simply by calling
http:JSONDecode([String])
So if we call
local jsonarray = http:JSONDecode(jsonstringraw) print(jsonarray.gender)
14
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