OO.lua

--[[ The nasty OO

Animal = {
	size=1, age=2, 
	sleep = function (self)
		print("I need sleep.")
		print("size"..self.size.."\tage"..self.age)
	end
}

Tiger = {
	color=3, 
	run = function (self)
		print("I can run. size="..self.size.."age="..self.age.."color="..self.color)
	end
}

setmetatable(Tiger, {__index = Animal})

t = Tiger
Tiger = nil
t:run()

]]

--[[ Lua OO

Animal = {
	size = 1,
	new = function (self, object)
		object = object or {}
		setmetatable(object, self)
		self.__index = self
		return object
	end
}

cat = Animal:new()
print(cat.size)

]]

-- Javascript OO
function Person()
	local name = 'default'

	return {
		get_name = function ()
			return name
		end,
		set_name = function (new_name)
			name = new_name
		end
	}
end

p = Person()
print(p.get_name())
p.set_name("topin27")
print(p.get_name())
q = Person()
print(q.get_name())