I'm think perhaps there is not a way to do this, but I thought it worth asking. I want to do something like the following: public class Super { public static String print() { System.out.println(new Super().getClass().getSimpleName()); } public Super() {} } public class Subclass extends Super { public Subclass() {} publ...
Can anyone explain disadvantage of inheritance in java ...
In C#, how can I find if a given object has a specific ancestor? For example, say I have the following class structure. ContainerControl | +----> Form | +--> MyNormalForm | +--> MyCustomFormType | +---> MyCustomForm If I have a method like this: void MyC...
Whenever i override a method of a base class, other than my implementation of this method, i seem to have 3 choices. 1) Call base.Method(), and then provide my implementation. 2) Provide my implementation and then call base.Method() 3) Just provide my implementation. Recently while using a library i have realized few bugs that were i...
In my new project I wish to (mostly for to see how it will work out) completely ban raw pointers from my code. My first approach was to let all classes inherit from this simple class: template class Base { public: typedef std::shared_ptr ptr; }; And simple use class::ptr wherever I need a pointer. This ap...
Here is some C++ code: #include <iostream> using namespace std; class m { public: m() { cout << "mother" << endl; } }; class n : m { public: n() { cout << "daughter" << endl; } }; int main() { m M; n N; } Here is the output: mother mother daughter My problem is that I don't want the m's constructor to...
Hi! I start develop application on Android! I need to show common control on the top of few screens. In Blackberry I just inherit my screens from base screen with needed controls and it inherit UI and behaviour from base type. How can i do similar thing in Android? I mean, how can i organize it? Maybe, i need to create control or layout...
Hi, I know that I could do a simple prototypal inheritance in JavaScript like this: var Parent = function() { }; var Child = function() { } Child.prototype = new Parent(); Child.prototype.constructor = Child; However, I'm curious to how one would accomplish deeper inheritances? What about multi-inheritance, is that possible? ...
How to model this in django: 1) have a base network of manufacturers 2) under each network their might be several distributors 3) a user of the system can access items through the distributor 4) if a user access the item through the distributor we want that item to be translated where each manufacturer will have their own translation...
In propel 1.3 and 1.4 the following inheritance structure worked fine. table name="payment_method" baseClass="rwf.lib.SymmetricEncryptedObject"> column name="id" type="INTEGER" required="true" autoIncrement="true" primaryKey="true"/> column name="discriminator" type="INTEGER" inheritance="single" required="true"> in...
Possible Duplicate: Calling virtual functions inside constructors class Base { virtual void method() { cout << "Run by the base."; }; public: Base() { method(); }; }; class Derived: public Base { void method() { cout << "Run by the derived."; }; }; void main() { Derived...
This has probably been asked before on SO, but I were unable to find a similar question. Consider the following class hierarchy: class BritneySpears { public: virtual ~BritneySpears(); }; class Daughter1 : public BritneySpears { public: virtual ~Daughter1(); // Virtual specifier }; class Daughter2 : public BritneySpears...
I have extracted following difference between inheritance and composition. I wanted to know what does delay of creation of back end object mean? Please find below difference. Composition allows you to delay the creation of back-end objects until (and unless) they are needed, as well as changing the back-end objects dynamically through...
Let's say I have something like this: abstract class Parent { protected function foobar($data) { //do something with data return $result; } } class Child extends Parent { public function foobar() { $data = ...; return parent::foobar($data); } } As you can see, foobar is generi...
Let's say I have a base class defined as follows: class Form(object): class Meta: model = None method = 'POST' Now a developer comes a long and defines his subclass like: class SubForm(Form): class Meta: model = 'User' Now suddenly the method attribute is lost. How can I "get it back" without forcing...
I know that when inheriting classes, you can also inherit Constructors example: class Book : Genre { Book(string param1, int param2, string inherit1, string inherit2) : Base(inherit1,inherit2) { Prop1 = param1 Prop2 = param2 } } But wouldn't it just be easier to set the inherited properties via the constru...
Is it possible to inherit both or all parts of a class (other than private) in C++? class A { } clas B : ...? { } ...
<?php class Base { protected static $c = 'base'; public static function getC() { return self::$c; } } class Derived extends Base { protected static $c = 'derived'; } echo Base::getC(); // output "base" echo Derived::getC(); // output "base", but I need "derived" here! ?> So what's the best workaround? ...
In extjs you can always extend an extjs class via the constructor(). For classes derinving from Component you can also extend via initComponent(). I am wondering why so many code extend via initComponent, whereas constructor seems to be the universal extension method. Does initComponent offer clear advantage over constructor? ...
I have a class (Wall) that inherits from Sprite. Sprite already has width and height properties. But for wall, I need to do some other additional calculations when the properties change (f.e. make sure the new size won't cause it to overlap any other walls). So, how do I set the width property inherited from the Sprite class from withi...