addChangeHandler

Description

This function will be performed when a value in a table changes.

Syntax

addChangeHandler(table,"value",function)

Example

function broadcastScore(self, newvalue)
	outputChatBox("The Score is now "..tostring(newvalue))
end

local tab = {}
addChangeHandler(tab, "score", broadcastScore)

tab.score = 12 -- "The Score is now 12"

But you can use it to set a value as read only too.

function readOnlyScore(self, newvalue)
	-- The old value will be returned so the newvalue will be ignored
	return self.score
end

local tab = {}
tab.score = 12
 addChangeHandler(tab, "score", readOnlyScore)

tab.score = 15 

print(tab.score) -- 12