Без заголовка

У меня Lua тут только пример. Постинг не об этом языке. Тем не менее: http://lua-users.org/wiki/LuaProgramming, плюс нужно не забывать: A fundamental concept in the design of Lua is to provide meta-mechanisms for implementing features, instead of providing a host of features directly in the language. For example, although Lua is not a pure object-oriented language, it does provide meta-mechanisms for implementing classes and inheritance. Lua's meta-mechanisms bring an economy of concepts and keep the language small, while allowing the semantics to be extended in unconventional ways. (http://www.lua.org/about.html). Поэтому полно инициатив типа http://www.lua.org/wshop11/luaws11_ag.pdf