I'm trying to force an inherited class to use a custom attribute. I'm creating a class library where the user who wants to create an item will do so, but be forced to add an attribute (or visual studio will automatically add the default attribute) to their inherited class. Here is what I'm hoping to achieve: BaseClass.vb: <CustomA...
If subclass in objective-c wants to override a super class's method, does it have to match the return type too? ...
Is it possible to override or shadow (new in C#) instance methods with extension methods? ...
Hi I would like to count the number of calls made to eval in our javascript application. I came up with the following, but it generates errors. These errors are hard to track, and my knowledge of the app is limited. Can you tell what is wrong with my code ? increment = function (){ var me = arguments.callee; if (!me.count) me.co...
Hello I would like to shadow/override an event in VB.NET. I do it only because I have to implement in this object an interface, that contains the same event like the base object itself, and I need to keep this base event as is it without modification nor supplementary event additions. How can I do it? Public Shadows Event VisibleCha...
I search around and tried overriding the "for" keyword but I found nothing. I am trying something like that: def for("maybe_arguments_go_here") print "Hello from function for!" end for i in 1..3 print "Hello from for" end ...
I'm trying to learn overriding operators in C++. But I'm stuck with this: ..\src\application.cpp: In function `int main()': ..\src\application.cpp:29: error: no match for 'operator<<' in 'std::operator<< >&">with _Traits = std::char_traits(&std::cout)), ((const char*)"Poly A: ")) << (&A)->Poly::operator++(0)' Here's the line ...
Consider this: class A { int x =5; } class B extends A{ int x =6; } public class CovariantTest { public A getObject() { return new A(); } /** * @param args the command line arguments */ public static void main(String[] args) { // TODO code application logic here Covar...
Hello there, this my problem i have a class X that inherits UITableViewController class and a class Y that inherits the X class, when i try to override a method in the Y class the method in the X class is invoked... and i can't find references to understand what's happening... can anyone help me? Thanks in advance! Code! mluListBuilde...
can i overload or override methods just by using different return value ? is virtual matter in thie case ? for example : class A{ virtual int Foo(); // is this scenario possible with/without the keyword virtual } class B : public A { virtual double Foo(); } A* Base = new B(); int i = Base->Foo(); // will this just convert doubl...
Hi, I have overriden a controller class in a java projects in order to add an interceptor, I would like to know if there is anyway I can remove the "error" showing up in Eclipse: The type CRUD is already defined I don't think the code will help much but there you go: package controllers; public abstract class CRUD extends Con...
What is the difference between override and overload? ...
What's better: Private Sub Window_Closed(sender As Object, e As EventArgs) Handles Me.Closed 'Do stuff End Sub Protected Overrides Sub OnClosed(ByVal e As System.EventArgs) MyBase.OnClosed(e) 'Do stuff End Sub I personally think that the second is better, 1st because it doesn't add a handler, and also because the synta...
Assume, I have an object x of MyClass. What method is called, when I do puts x? I need to override it with my own one. I thought it was .inspect, but somehow overridden inspect isn't being called. For example, I have a class Sum: class Sum initiazlie a, b @x = a + b end end And I wanna access the result like this: s = Sum...
I'm new to Java, and I've read over some tutorials on overriding methods, but an example I'm looking at isn't working the way I expect. For example, I have the code: public class A{ public void show(){ System.out.println("A"); } public void run(){ show(); } public static void main( String[] arg ) { ...
In C++, will a member function of a base class be overridden by its derived class function of the same name, even if its prototype (parameters' count, type and constness) is different? I guess this a silly question, since many websites says that the function prototype should be the same for that to happen; but why doesn't the below code...
Hi, I would like to replace parent function (Somefunc) in child class, so when I call Main procedure it should fail. Is it possible in Perl? Code: package Test; use strict; use warnings; sub Main() { SomeFunc() or die "Somefunc returned 0"; } sub SomeFunc() { return 1; } package Test2; use strict; use warnings; our @ISA...
Hi, I am creating a custom control Toolbox that is derived from ItemsControl. This toolbox is supposed to be filled with icons coming from the database. The definition looks like this: public class Toolbox : ItemsControl { protected override DependencyObject GetContainerForItemOverride() { return new Toolbo...
Hi, guys I know this question is very basic but I've met in few publications (websites, books) different style of override virtual function. What I mean is: if I have base class: class Base { public: virtual void f() = 0; }; in some publications I saw that to override this some authors would just say: void f(); and some would ...
Hi, I have one abstract class -let's say myBase. And I want all the classes derived from myBase to have one static field called public static List<string> MyPArameterNames { get {return _myParameterNames;} } So, every child class can tell what parameter names it uses; I want static because I do not want to create an instance just ...