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Thanks a lot!

> http://www.lua.org/pil/16.4.html

local self = {
   balance = initialBalance,
   LIM = 10000.00,
}

Why put all these variables into table?

> Nothing wrong with it, using closures is a fine, if expensive, way of doing things.

Expensive for memory and cheaper for speed.
I think, this is cool alternative to 'object:method (args)' stuff.
Anyway, shouldn't it be at http://lua-users.org/wiki/ObjectOrientedProgramming