Issue when doing object oriented programming with metatables

[ScriptingSausage (Oob)]

I’m trying to use object oriented programming in my code because it makes it neat and reusable but I have a problem.

Here’s an example of my problem:

local class = {}
class.a = 1
class.print = function() print(class.a) end
class.__index = class

local new = setmetatable({}, class)
new.a = 2
new.print()

So over here, a is the value in the table, and print is a function that prints a.

The problem is, with the second table, I change a to 2, so I want print to print 2 now instead of 1. But it still prints 1, and I’m not sure how to get around this problem.

[dthecoolest]

The advantage of OOP is that you can use self and : notation. I believe this is what you are looking for:

local class = {}
class.a = 1
class.print = function(self) print(self.a) end
class.__index = class

local new = setmetatable({}, class)
new.a = 2
new:print() --prints 2
new.print(new)--also prints 2

[ScriptingSausage (Oob)]

Oh I see, I think the problem is that I used . instead of : so self was nil. Thanks! Or maybe because I wasnt defining self as the first parameter.