class Vehicle { public int wheels; public int lights; } class Car extends Vehicle { public int wheels =4; public int lights =2; public void lights_on( int lights){ //Code to onlights } } class BMWCar extends Car { public int wheels =4; public int lights =4; } public class TestCar { public static void ma...
In the MSDN documentation, System.Reflection.Assembly has a property called CodeBase which is defined as overridable. Public Overridable ReadOnly Property CodeBase As String However, if I try to create a new class that inherits System.Reflection.Assembly, I get an error message that tells me it cannot be inherited. So how can I overr...
I want all the functionality of Dictionary<TKey,TValue> but I want it as Foo<TKey,TValue>. How should I go about doing this? Currently I am using class Foo<TKey,TValue> : Dictionary<TKey, TValue> { /* I'm getting all sorts of errors because I don't know how to overload the constructors of the parent class. */ ...
I have an app that contains different "skins", and most of these skins share the same images. For each skin, we have been creating a copy of the image directory, just in case one of the files is different. Is there something like object oriented inheritance for an IIS directory? Meaning if a file exists, use it, otherwise pull the file ...
I would like to keep this one short. I build a HouseA that has two rooms, say BedRoom and StudyRoom, both deriving from a base class called Room. BedRoom and StudyRoom have a same parent called House. Also, any room in a house can access any other rooms only through the parent. If BedRoom has to access any attribute of StudyRoom, it has ...
How to implement inheritance with active records? For example, I want a class Animal, class Dog, and class Cat. How would the model and the database table mapping be? ...
Im using the Qt library. I'm currently trying to create my own QDockWidget (the class MY class is inheriting). Right now MY class has an ptr to QDockWidget. Does this even make sense? is that a legal statement? is there a better way to separate the QDockWidget from the rest of my program in Qt? Im a little lost on how to implement a new ...
Storing objects in heterogeneous vector with stack-allocated objects Hello, Say I have an abstract class CA, derived into CA1, CA2, and maybe others. I want to put objects of these derived types into a vector, that I embbed into a class CB. To get polymorphism right, I need to store a vector of pointers: class CB { std::vector <C...
Hi all, i'm trying to understand java behaviour. Using this interfaces : public interface IA {} public interface IB extends IA {} public class myClass implements IB {} I'm overloading a method like this : public void method(IA a); public void method(IB b); When calling method with the following object : IA a = new myClass(); met...
Suppose I have a base form Main1 which may need to be altered slightly, including perhaps adding additional Controls and altering the size/location of existing Controls. Those base Controls which I need to alter I set to 'protected' in the designer. So I have another form, Main2, that derives from Main1. Then I have another form, Main...
I have two console apps, Query and Update, that share some functionality. I wanted to have the two classes inherit from a common base class, but the problem is that, for a console app, I have to have a static Main function. What I currently have is the following: namespace Utils { public class ConsoleBase { protected c...
I have a class in PHP like so: class ParentClass { function __construct($arg) { // Initialize a/some variable(s) based on $arg } } It has a child class, as such: class ChildClass extends ParentClass { function __construct($arg) { // Let the parent handle construction. parent::__construct($arg); ...
Is there anyway to discover the base class of a class in Python? For given the following class definitions: class A: def speak(self): print "Hi" class B(A): def getName(self): return "Bob" If I received an instance of an object I can easily work out that it is a B by doing the following: instance = B() print B.__c...
For context - read this. Problem: class Program { static void Main() { var b = new bar(); b.buzz().fizz().buzz().fizz(); //cool // ^FAIL!!!...<------------------------------------ Console.ReadLine(); } } public class foo { p...
I was attempting to set up an aspect on one of the classes extending AbstractAction (SWF - package org.springframework.webflow.action) on the public final method execute. The execute is the only public method in the interface Action class It's signature is: public abstract Event execute(RequestContext requestcontext) throws Exception...
In JavaScript, I want to create an object instance (via the new operator), but pass an arbitrary number of arguments to the constructor. Is this possible? What I want to do is something like this (but the code below does not work): function Something(){ // init stuff } function createSomething(){ return new Something.apply(null...
hello I want to set the days of a datetimepicker in english but unfortunatly, the datetime picker don't support culture so I think I can inherit the control, and set the days and months name by myself but I don't know how anybody has an idea for that ? thanks in advance Sam ...
I am attempting model inheritance on my Django powered site in order to adhere to DRY. My goal is to use an abstract base class called BasicCompany to supply the common info for three child classes: Butcher, Baker, CandlestickMaker (they are located in their own apps under their respective names). Each of the child classes has a need fo...
In COM, if I have an interface IBase and an interface IX which inherits from IBase, can I call methods of IBase through an IX pointer, and if not, why can I call Release() and AddRef() on any COM interface pointer without an upcast? ...
I have a problem in MSVC++ 2008 where VS2008 is throwing this compile error: error C2509: 'render' : member function not declared in 'PlayerSpriteKasua' Now, what's confusing me is that render() is defined, but in an inherited class. The class definition works like this: SpriteBase -Inherited By-> PlayerSpriteBase -Inherited By-> Pl...