multiple-inheritance

I have two classes in Lua. test1 = {test1Data = 123, id= {0,3}} function test1:hello() print 'HELLO!' end function test1:new (inp) inp = inp or {} setmetatable(inp, self) self.__index = self return inp end test2 = {} function test2:bye () print 'BYE!' end function test2:create_inst( baseClass ) local new_class = {} local class_mt = { __index = new_class } function new_class:create() local newinst = {} setmetatable( newinst, class_mt ) return newinst end if baseClass then setmetatable( new_class, { __index = baseClass } ) end return new_class end a = test1:new({passData='abc'}) print (a

I have a reference class Child which inherits from parents SuperA and SuperB . When in the initialize method of Child , I would like to invoke the initialize methods of both SuperA and SuperB in turn. Thus, for instance, I have: SuperA <- setRefClass("SuperA", fields = list(a = "ANY"), methods = list( initialize = function(a) { print(a) initFields(a = a) } ) ) SuperB <- setRefClass("SuperB", fields = list(b = "ANY"), methods = list( initialize = function(b) { print(b) initFields(b = b) } ) ) Child <- setRefClass("Child", contains = c("SuperA", "SuperB"), methods = list( initialize = function(a

I am trying to do something I haven't really done before. I basically have 3 classes. Class A is an abstract class with pure virtual methods, Class B is a class on it's own that contains methods with the same name as the virtual methods in Class A. I'm trying to tie everything together in Class C. I'd like to inherit class B and A in C (multiple inheritance), and use the methods from Class B to implement those in class A. This way I create a modular approach. The example below is a very simplified version of my code. class A { virtual int methodA() = 0; virtual int methodB() = 0; virtual int

I'm looking at this data model I've come up with and not feeling comfortable. I've changed the entity names so it (hopefully) makes more sense. In any event, how would you model the following? I have 3 entities. GovernmentCustomer, PrivateCustomer, PublicCustomer. Private and Public Customer are both CorporateCustomers. Corporate and Government Customers are Accounts. All Accounts share the same key space (So if PrivateCustomer has a PK of 1 it shouldn't be possible for Public or GovernmentCustomer to have a PK of 1). CorporateCustomers have some 1:M relationships that GovernmentCustomer's don

I have used faking of multiple inheritance as given in Can I extend a class using more than 1 class in PHP? Notice that class A actually extends class B and faking is done for extending from class C. It was working fine until I needed an attribute set in a function of class C to be available in class A. Consider a little edited version of that code where I call a function of class C from inside a function of class A :- //Class A class A extends B { private $c; public function __construct() { $this->c = new C; } // fake "extends C" using magic function public function __call($method, $args) {

I think that there's a solution to my inheritance problem but I can't find it. I'm developing an Android application (target is Android 2.1) which reuses a SlidingDrawer (for my menu) on most of the pages. In order to avoid to initialize it on all the Activity I created a DefaultActivity to do so. It worked well until I had to extends TabActivity because Java doesn't support multiple inheritance. Basically I have the following Default activity public class DefaultActivity extends Activity{ // Declarations @Override public boolean onCreateOptionsMenu(Menu menu) { // Some code } @Override

Does non-polymorphic inheritance require this pointer adjustment? In all the cases I've seen this pointer adjustment discussed the examples used involved polymorphic inheritance via keyword virtual . It's not clear to me if non-polymorphic inheritance would require this pointer adjustment. An extremely simple example would be: struct Base1 { void b1() {} }; struct Base2 { void b2() {} }; struct Derived : public Base1, Base2 { void derived() {} }; Would the following function call require this pointer adjustment? Derived d; d.b2(); In this case the this pointer adjustment would clearly be

I have C# class definition MyViewModelClass: INotifyPropertyChanged, MyAbstractBaseForVMClass It won't compile. Gives and error at the start of MyAbstractBaseForVMClass literal: Interface definition is expected. Can I not realize an interface, and inherit from an abstract class at the same time? No you can. Just reverse them. MyViewModelClass: MyAbstractBaseForVMClass, INotifyPropertyChanged Interfaces always come after classes. 来源： https://stackoverflow.com/questions/7194952/inherit-from-an-abstract-class-and-realize-an-interface-at-the-same-time