overriding

I am looking for a way to properly ovverride the default .create() method of a ModelSerializer serializer in Django Rest Framework for dealing with an extra parameter. In my original Django model I have just overridden the default .save() method for managing an extra param. Now .save() can be called also in this way: .save(extra = 'foo') . I have to create a ModelSerializer mapping on that original Django model: from OriginalModels.models import OriginalModel from rest_framework import serializers class OriginalModelSerializer(serializers.ModelSerializer): # model fields class Meta: model =

Preface: This is a question about best practices regarding a new meaning of the delete operator introduced with C++11 when applied to a child class overriding an inherited parent's virtual method. Background: Per the standard, the first use case cited is to explicitly disallow calling functions for certain types where conversions would otherwise be implicit such as the example from §8.4.3 of the latest C++11 standard draft : struct sometype { sometype() = delete; // OK, but redundant some_type(std::intmax_t) = delete; some_type(double); }; The above example is clear and purposeful. However,

I'm aware that a params modifier (which turns in one parameter of array type into a so-called "parameter array") is specifically not a part of the method signature. Now consider this example: class Giraffid { public virtual void Eat(int[] leaves) { Console.WriteLine("G"); } } class Okapi : Giraffid { public override void Eat(params int[] leaves) { Console.WriteLine("O"); } } This compiles with no warnings. Then saying: var okapi = new Okapi(); okapi.Eat(2, 4, 6); // will not compile! gives an error( No overload for method 'Eat' takes 3 arguments ). Now, I know that the compiler translates the

Why does this happen? http://coliru.stacked-crooked.com/a/e1376beff0c157a1 class Base{ private: virtual void do_run() = 0; public: void run(){ do_run(); } }; class A : public Base { public: // uplift ?? virtual void do_run() override {} }; int main() { A a; a.do_run(); } Why can I override a PRIVATE virtual method as public? According to https://en.cppreference.com/w/cpp/language/virtual#In_detail overwriting a base's virtual member function only care about the function name, parameters, const/volatile-ness and ref qualifier. It doesn't care about return type, access modifier or other things

I've used the @Override in java and has come in quite handy. Is there anything similar in c#? The C# compiler provides compile-time checking for method overrides, including checking if the method is actually overriding as you intended. You can indicate that a method should be overridden using the .NET override keyword. SLaks In C#, you must use the override keyword to override functions. If you use override without a matching virtual or abstract base function, you'll get a compiler error. If you don't use override , and there is a matching base function, you'll get a compiler warning (unless

If you're implementing a subclass, you can, within your implementation, explicitly call the superclass's method, even if you've overridden that method, i.e.: [self overriddenMethod]; //calls the subclass's method [super overriddenMethod]; //calls the superclass's method What if you want to call the superclass's method from somewhere outside the subclass's implementation, i.e.: [[object super] overriddenMethod]; //crashes Is this even possible? And by extension, is it possible to go up more than one level within the implementation, i.e.: [[super super] overriddenMethod]; //will this work? A

I'm trying for half an eternity now overriding QWidgets keyPressEvent function in QT but it just won't work. I've to say i am new to CPP, but I know ObjC and standard C. My problem looks like this: class QSGameBoard : public QWidget { Q_OBJECT public: QSGameBoard(QWidget *p, int w, int h, QGraphicsScene *s); signals: void keyCaught(QKeyEvent *e); protected: virtual void keyPressEvent(QKeyEvent *event); }; QSGameBoard is my QWidget subclass and i need to override the keyPressEvent and fire a SIGNAL on each event to notify some registered objects. My overridden keyPressEvent in QSGameBoard.cpp

Closed. This question is off-topic . It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 3 months ago . Let's say I have a class Person which looks like this: class Person { constructor( public firstName: string, public lastName: string, public age: number ) {} } Is it possible to override the toString() method in this class, so I could do something like the following? function alertMessage(message: string) { alert(message); } alertMessage(new Person('John', 'Smith', 20)); This override could look something like

It is certainly not for good OOP design - as the need for common behavior of all instances of a derived class is quite valid conceptually. Moreover, it would make for so much cleaner code if one could just say Data.parse(file) , have the common parse() code in the base class and let overriding do its magic than having to implement mostly similar code in all data subtypes and be careful to call DataSybtype.parse(file) - ugly ugly ugly So there must be a reason - like Performance ? As a bonus - are there OOP languages that do allow this ? Java-specific arguments are welcome as that's what I am