How can I know if a value changed?

Help and Feedback Scripting Support
1
  1. What do you want to achieve?
    I want to know how to know if a value changed !
  2. What is the issue?
    The code only executes one time !
  3. What solutions have you tried so far?
    I have this code and I want to know if the year has changed for execute the code :
if Year % 4 == 0 then
	LeapYear = true
else
	LeapYear = false
end

Have a good day :yum:

2

Hi! if you have a object that stores the value do this:

local ValueObject = ....

ValueObject:GetPropertyChangedSignal("Value"):Connect(function()
-- Code for when value changes
end)
1 Like
3

Hi! :wink:
I have already just a variable named “Year”. :grinning:

4

Is it possible to do this without any ValueObject ? :thinking:

5

Well, to make it simple for yourself make that ValueObject. :slight_smile:

local Year = Instance.new("IntValue")
Year.Name = "Year"
Year.Parent = script

Year:GetPropertyChangedSignal("Value"):Connect(function()
-- Code for when value changes
end)
1 Like
6

I have do this but it does not work : :thinking:


local year = Instance.new("NumberValue")
year.Name = "Year"
year.Parent = script

year:GetPropertyChangedSignal("Value"):Connect(function()
	if Year % 4 == 0 then
		LeapYear = true
		print("LeapYear")
	else
		LeapYear = false
		print("NotLeapYear")
	end
end)

while wait(1) do
	Year = Year + 1
end
7

Hi!
I would recommend using IntValue over NumberValue, if you don’t use decimals in your “Year”.

When that is said, since you defined “Year” as a objectValue, you gotta say “Year.Value” instead of “Year”.

local year = Instance.new("NumberValue")
year.Name = "Year"
year.Parent = script

year:GetPropertyChangedSignal("Value"):Connect(function()
	if year.Value % 4 == 0 then
		LeapYear = true
		print("LeapYear")
	else
		LeapYear = false
		print("NotLeapYear")
	end
end)

while wait(1) do
	year.Value += 1
end
1 Like
8

Yes, but I need to do an infinite loop for definite the variable year ?

9

I’m not quite getting what you mean? :slight_smile:

1 Like
10

It works perfectly but I don’t know how you did it… can you explain? :neutral_face:

11

Sorry, I speak little english … :sweat_smile:

12

Finally it does not work because I haven’t got the true variable “Year” I made ! :sweat_smile:

13

Yea I can explain the script for you. :slight_smile:

local year = Instance.new("IntValue") -- We define our "year" variable to be a new "IntValue", which will contain numbers without decimals. Use "NumberValue" if you wish to have decimals.
year.Name = "Year" -- We set the name on our new ValueObject to be "Year"
year.Parent = script -- We set the parent on our new ValueObject to be the this script.

year:GetPropertyChangedSignal("Value"):Connect(function() -- We create a signal here, that will run everytime our ValueObject changes value.
	if year.Value % 4 == 0 then
		LeapYear = true
		print("LeapYear")
	else
		LeapYear = false
		print("NotLeapYear")
	end
end)

while wait(1) do
	year.Value += 1 -- We take our ObjectValue's Value, and says it should be it's current value + 1, meaning if our ObjectValue's current value is 2, then it will be 2+1 (year.Value +=1 is the same as year.Value = year.Value + 1, just shorter)
end
2 Likes
14

Thank you so much I’ve understand look at this :yum: :

local year = Instance.new("NumberValue")
year.Name = "Year"
year.Parent = script

year:GetPropertyChangedSignal("Value"):Connect(function()
	if year.Value % 4 == 0 then
		LeapYear = true
		print("LeapYear")
	else
		LeapYear = false
		print("NotLeapYear")
	end
end)

while wait() do
	year.Value = Year
end
15

Can I ask why you set the year.Value to be Year? is it because you change “Year” elsewhere? :smiley:

1 Like
16

Yes it is exactly, you want to see ? :grin:

17

Yea that would be nice, then we might be able to change the coding.

1 Like
18

Ah okay but it works like that, don’t worry! :wink:

if Time == "00:00:00" then
	Day = Day + 1
	if Month == 1 or 3 or 5 or 7 or 9 or 11 then
		if Day == 32 then
			Month = Month + 1
			Day = 1
		end
	elseif Month == 4 or 6 or 8 or 10 or 12 then
		if Day == 31 then
			Month = Month + 1
			Day = 1
		end
	elseif Month == 2 then
		if LeapYear == true then
			if Day == 30 then
				Month = Month + 1
				Day = 1
			end
		else
			if Day == 29 then
				Month = Month + 1
				Day = 1
			end
		end
	elseif Month == 13 then
		Year = Year + 1
		Month = 1
	end
end