Problem with :Connect and string values

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1

I am trying to make it so when the value changes it fires a function in the same script.

Code:

folder:WaitForChild("Sweat"):GetPropertyChangedSignal("Value"):Connect(update("Sweat"))

Function:

function update(value)
print(value)
end

Error:

image
image758Ă—29 16.5 KB

I have tried studio and roblox.

1 Like
2 
folder:WaitForChild("Sweat"):GetPropertyChangedSignal("Value"):Connect(update)

Whatever the new value of “Sweat” is will be passed into the “update” function.

3

When connecting a pre-made function, you don’t need to add the brackets afterwards: instead just put the name:

function update(value)
    print(value)
end

folder:WaitForChild("Sweat"):GetPropertyChangedSignal("Value"):Connect(update)

Or alternatively you could create the function in the line:

folder:WaitForChild("Sweat"):GetPropertyChangedSignal("Value"):Connect(function(value)
    print(value)
end)
4

Since others have mentioned the issue, I’ll introduce something different to the table.
The StringValue object has a Changed event that passes the new value when Value was changed. More info can be found here: StringValue.Changed (roblox.com)

local strv = Instance.new("StringValue")
strv.Changed:Connect(function(str) print(str) end)

strv.Parent = game.Workspace -- No output
strv.Value = "Hello World!" -- Outputs "Hello World!"
5

You could just replace it with the code below. Another thing you could do is connect it into a function and then run the function which you wrote.

folder:WaitForChild("Sweat"):GetPropertyChangedSignal("Value"):Connect(function()
    update("Sweat")
end)
6

Maybe this will work.

local Sweat = folder:WaitForChild("Sweat")

function Update()
    local Value = Sweat.Value
end

Sweat:GetPropertyChangedSignal("Value"):Connect(Update)

Or try,

Folder:WaitForChild("Sweat"):GetPropertyChangedSignal("Value"):Connect(function()
    Update("Sweat")
end)
7

A great way to debug things is to step through them in your mind.

  • Wait for child “Sweat” of folder
  • Get property changed signal “Value” of Sweat
  • Call update function with parameters “Sweat” which returns nil
  • Connect nil to property changed signal

What you probably wanted was:

  • Connect update function to property changed signal

So, we must connect the function instead of calling it first and connecting whatever it returns:

folder:WaitForChild("Sweat"):GetPropertyChangedSignal("Value"):Connect(update)

Also, note that the property changed signal doesn’t return the property, so:

local sweat = folder:WaitForChild("Sweat")

function update()
    local value = sweat.Value
    print(value)
end

sweat:GetPropertyChangedSignal("Value"):Connect(update)