static (class) variables
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- Subject: static (class) variables
- From: Andreas Matthias <andreas.matthias@...>
- Date: 2015年11月22日 18:30:50 +0100
In the code below I tried to define a static (class) variable `Display.count'.
It seems to work at first. But doesn't work any more once you rename the class.
What's the correct way to get static variables?
Andreas
Display = {}
Display.count = 0
function Display:new ()
local me = {}
setmetatable(me, self)
self.__index = self
Display.count = Display.count + 1
return me
end
function Display:getCount ()
return Display.count
end
dis1 = Display:new()
dis2 = Display:new()
print(dis1:getCount(), dis2:getCount())
-- now let's rename Display
DDD, Display = Display, nil
dis = DDD:new()
print(dis:getCount())