Lua的類有點像javascript,但是更簡明靈活，table即對象，對象就是類。Metatables比起ruby里的MetaClass更加好用，缺點是實例化和繼承的代碼有點多，
不像ruby里的“<”和“<<”,繼承鏈就是查找方法時的方法鏈。
Account={ test1=function(a) print("Account test1") end}Account.test2=function(a) print("Account test2") endfunction Account.test3(a) print("Account test3") endfunction Account:new (o) --類的實例化 o = o or {} setmetatable(o, self) self.__index = self return oendfunction Account.print0(o,a) print(a)endfunction Account:print1(a) print(a)end--方法定義測試Account.test1()Account.test2()Account.test3()--類測試acc=Account:new()acc.test1()acc.print0(acc,"dot print0")acc:print0("not dot print0")acc.print1(acc,"dot print1")acc:print1("not dot print1")acc.specialMethod=function(specialMethodTest) print(specialMethodTest)endacc.specialMethod("smt test")--繼承測試SpecialAccount = Account:new()s = SpecialAccount:new{limit=1000.00}--多重繼承測試Named = {}function Named:getname () return self.nameendfunction Named:setname (n) self.name = nendlocal function search (k, plist) for i=1, table.getn(plist) do local v = plist[i][k] if v then return v end endendfunction createClass (...) local c = {} -- new class setmetatable(c, {__index = function (t, k) return search(k, arg)end})c.__index = cfunction c:new (o) o = o or {} setmetatable(o, c) return oend return cendNamedAccount = createClass(Account, Named)account = NamedAccount:new{name = "Paul"}print(account:getname())新聞熱點
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