I am doing Object Oriented programming in JavaScript without Prototype/jQuery (I use jQuery for other stuff). It has been working fine so far, but I ran into an issue with inheritance. Basically, when I declare objects in a constructor, they are shared between instances. Below is some sample code: A = function() { this.y...
I’m trying to do the following: class Animal { class Bear : public Animal { // … }; class Giraffe : public Animal { // … }; }; … but my compiler appears to choke on this. Is this legal C++, and if not, is there a better way to accomplish the same thing? Essentially, I want to create a cleaner...
I want to write some javascript classes which extend DOM nodes (so that I can then insert instances of my class directly into the DOM), but am having difficulty finding out which class/prototype I should inherit from. eg function myExtendedElement() { this.superclass = ClassA; this.superclass(); delete this.supercl...
I'm used to working in visual C++. In learning C#.NET I tend to try to find equivalent methods to how things are done in VC++. When I have a button in C++, to get full control over it I create a class derived from CButton (the equivalent of System.Windows.Forms.Button in .NET) and then set this class as the type for my button in order t...
In one project I have an Editor Class: namespace TestXamlInherit234 { public class CustomerEditor : BaseEditor { public CustomerEditor() { TheMessage.Text = "changed222"; } } } which inherits from a WPF User Control in another project: using System.Windows.Controls; namespace Core { ...
This is probably something I'm overlooking in C# inheritance, but I was trying to build a class that implements IList(The System.Collections version, not generics) The compiler complained that I didn't implement an indexer, but I was looking at CollectionBase, which also implements IList, and it doesn't appear to expose an indexer either...
We're building about 10 ASP.NET MVC sites which have a common set of features (and corresponding URLs, Routes, Controllers, Actions, and Views). The sites will also all share a base set of domain objects (e.g. users, companies) and base attributes on those objects (e.g. name, address, etc.). But each site will also be highly customize...
I have a class A. I have a reference ref of class A pointing to an object of type x. What kind of object makes ref.getClass() print A$1 ? And what does $ signify? ...
i have a windows form that inherites from another windows form in the same project, the problem is when i click a button in the inherited form the eventhandler fires twice performing the event in the parent form and then performs the event in the inherited form . any suggestions? http://www.metacafe.com/watch/852308/inheritied%5Fforms%5...
Dears, I cannot figure this out. I need to have an abstract template base class, which is the following: template <class T> class Dendrite { public: Dendrite() { } virtual ~Dendrite() { } virtual void Get(std::vect...
(this question is a refinement of my other question on this topic which was a bit complicated but I really want to understand why this doesn't work so here's a more straight-forward example) WHAT I WANT TO DO: create a simple class (no XAML) in one project which inherits a WPF UserControl (with XAML) in another project. Here is my inhe...
Hi! I am writing a simple application which communicates with web services a lot. So I am listening for success and fault events very often. When service returns a fault, I show an alert to a user saying something like: "Sorry there was a problem with a service, we will try to call it later" But there is a problem. When user didn't no...
Hello friendly Flashers... I have a movieClip with a button that I created inside of my display class Thumbnail.as and I have a button function that interacts with it inside of my ui class ThumbnailController.as. The current problem I'm having is that; in my ui class I can't target the movieClip playGlow which was created inside of m...
I have a large set classes which I need to "wrap" in a very thin subclass. The functionality of the base classes doesn't change, and their interface remains intact. The problem is, that in order to use the base classes's constructors (and most of them have more than one), I need to decalre an identical constructor in each of the subclas...
class Base { public: int i; Base() { cout<<"Base Constructor"<<endl; } Base (Base& b) { cout<<"Base Copy Constructor"<<endl; i = b.i; } ~Base() { cout<<"Base Destructor"<<endl; } void val() { cout<<"i:...
I am new to WPF and have created a WPF User Control Library I added a Base class that looks like this public class TControl : UserControl { } and want all of my controls to inherit from it. I have a Control called Notification which looks like public partial class Notification : TControl { public Notification() { In...
When a subclass overrides a baseclass's method, all of the baseclass's overloads are not available from the subclass. In order to use them there should be added a using BaseClass::Method; line in the subclass. Is there a quick way to inheirt the baseclass's overloads for ALL of the overridden methods? (not needing to explicitly specify ...
In his sitepoint article about javascript inheritance, Harry Fuecks explains a way of implementing inheritance as follows: function copyPrototype(descendant, parent) { var sConstructor = parent.toString(); var aMatch = sConstructor.match( /\s*function (.*)\(/ ); if ( aMatch != null ) { descendant.prototype[aMatch[1]] = p...
I was recently given the following piece of code as a sort-of puzzle to help understand Polymorphism and Inheritance in OOP - C#. // No compiling! public class A { public virtual string GetName() { return "A"; } } public class B:A { public override string GetName() { return "B"; } } ...
Hello, suppose that I have a class A with several subclasses (B, C, and D). I need B C and D to access some protected members from a class E. Is it possible to make B, C and D friends of E in a single hit without having to list them all? I have tried with: class E { friend class A; ... }; But this doesn't work. Thank you...