How to subtract a dictionary's value?

Help and Feedback Scripting Support
#1

Not sure if this in the right section or not but I do have a genuine question. How you you subtract a dictionary’s value? I’ve looked everywhere and couldn’t find anything. If I could get some answers that would be great. Thanks!

#2

Are you talking about a dictionary set up like this:

local dict = {
Value = 5
}

if so, you can do:

dict.Value -= 1

and you can subtract an item in the dictionary.

#3

Like this

Local tablethingy = {[1] = ["sss" ] = "ddd", ["sss" ] = "ddd", ["sss" ] = "ddd"}
#4

im trying to subtract the first value [1]

#6

When you say subtract, do you mean literally subject a number or remove the item completely?

Note that you can’t edit a key within a dictionary, instead you would have to add a new one.

1 Like
#7

Ah ok I think I might have an idea then thanks!

1 Like
#8 
local dictionary = {[1] = "13"}
print(tonumber(dictionary[1]) - 5) -- 8

Is this what you mean by subtract a dictionary’s value?

#9

yea something like that but in pairs so it would subtract every value in the table

#10 
local dictionary = {[1] = "13", [2] = "14", [3] = "15"}

for key, value in pairs(dictionary) do
tonumber(value) -= 5
print(value)
end
#11 
local dictionary = {[1] = "13", [2] = "15", [3] = "18"}

for i, v in pairs(dictionary) do
print(tonumber(v) - 5)
end
#12

image
image707×36 4.69 KB

#13

can you show which lines you are getting the errors from?

#14

Here do this:

local dictionary = {[1] = "13", [2] = "14", [3] = "15"}

for key, value in pairs(dictionary) do
	value -= 5
	print(value)
end

This subtracts the values without erroring

#15

It returns an error “attempt to perform arithmetic (sub) on table and number”

#16

Can you share your code, because it doesn’t error for me

#17

Ok sure I’m just gonna send the whole script if that’s ok

#18 
local TweenService = game:GetService("TweenService")

local NotificationsInQueue = {}
local ActiveNotifications = 0
local NotificationLimit = 3
local ActiveTime = 6
--local ActiveNotificationNum = #ActiveNotifications

local NotificationBox = script.Parent.Storage:WaitForChild("NotificationBox")
local NotificationSounds = script.Parent:WaitForChild("GUISounds")



local function Check() return end


local function PushNotification(Label, Text, Sound)
NotificationsInQueue[1] = nil
	
	for _,i in pairs(NotificationsInQueue) do
	i -= 1
	end
	
	for _,i in pairs(script.Parent.Holder:GetChildren()) do
		if i:IsA("Frame") then
			
			i:TweenPosition(UDim2.new(0,0, i.Position.Y.Scale - .300, 0), Enum.EasingDirection.InOut, Enum.EasingStyle.Quad,.2)
		end
	end
	
	local Clone = NotificationBox:Clone()
	ActiveNotifications = ActiveNotifications + 1
	task.wait(.6)
	Clone.Text.Text = Text
	Clone.Label.Text = Label
	Clone.Parent = script.Parent.Holder
	Clone:TweenPosition(UDim2.new(0,0, Clone.Position.Y.Scale, 0), Enum.EasingDirection.InOut, Enum.EasingStyle.Quad,.2)
	
	if Sound == "None" then
		NotificationSounds.none:Play()
	elseif Sound == "Error" then
		NotificationSounds.error:Play()
	elseif Sound == "Blop" then
		NotificationSounds.blop:Play()
	end
	
	task.spawn(function()
		task.wait(ActiveTime)
		Clone:TweenPosition(UDim2.new(1,0, Clone.Position.Y.Scale, 0), Enum.EasingDirection.InOut, Enum.EasingStyle.Quad,.3)
		task.wait(1)
		ActiveNotifications = ActiveNotifications - 1
		Clone:Destroy()
	end)
end

local function Insert(Label, Text, Sound)
	print("yea")
	table.insert(NotificationsInQueue,{["Label"] = Label; ["Text"] = Text; ["Sound"] = Sound})
	print("yea")
end

local function Update()
	if ActiveNotifications < NotificationLimit and #NotificationsInQueue > 0 and NotificationsInQueue[1] ~= Check() then
		print(NotificationsInQueue)
		PushNotification(NotificationsInQueue[1].Label, NotificationsInQueue[1].Text, NotificationsInQueue[1].Sound)
	end
end

task.wait(5)
Insert("Notification","chill bro","None")
task.wait(.1)
Insert("Notification","chill bro","None")
task.wait(.1)
Insert("Notification","chill bro","None")
task.wait(.1)
Insert("Notification","chill bro","None")
task.wait(.1)
Insert("Notification","chill bro","None")

while task.wait(.7) do 
	Update()
end
#19

here is where the part is if you need it

#20

Actually that is not where the problem is, and there are a number of problems and you would need to probably redo the script. You can’t use [] and should use {} when creating nested tables. When you switch it you would also have to switch out many other things.

#21

Tables with numbers as keys are actually called arrays, dictionaries are keys with strings.