Hi In a new Java project I try to apply as much best practices as possible. The one I'm having problems with is immutability. Although I understood the concept and already built some immutable classes I now came to a class where I think it's more appropriate to do it as a mutable class. The main problem is that I want to hide the mutab...
I have a friend who's just getting into .NET development after developing in Java for ages and, after looking at some of his code I notice that he's doing the following quite often: IDictionary<string, MyClass> dictionary = new Dictionary<string, MyClass>(); He's declaring dictionary as the Interface rather than the Class. Typically I...
I have a foolish doubt.Generally "System.Object" implements "Equals". When I implements IEquatable interface i can give custom definition ( I believe so) to my "Equals". so the professor class implementation is equal to class Professor:System.Object,IEquatable since there are different definitions of System.Equals ,and IEquatabl...
So, I realize the answer to this is probably "it's hard", but: I've got a weird idea, and was wondering if it's possible in Java to create a method like: <T> T wrapInterface (Class<T> interfaceClass, T wrappedObject) { if (mClass.isInterface()) { //create a new implementation of interfaceClass that, in each method, //does so...
I have a class (TabControlH60) that both inherits from a base class (UserControl) and implements an interface (IFrameworkClient). I instantiate the object using the .NET Activator class. With the returned instance, I can cast to the UserControl base class, but not to the interface. The exception I get is below the code snipet. How do I c...
When a class implements an Interface, is it better to access the properties and methods through the class itself or through its Interface? ...
http://msdn.microsoft.com/en-us/library/dd317976(VS.85).aspx STDAPI AccessibleObjectFromEvent( __in HWND hwnd, __in DWORD dwObjectID, __in DWORD dwChildID, __out IAccessible **ppacc, __out VARIANT *pvarChild ); What is IAccessible** equivalent in Delphi (2009)? ...
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...
The following code works, but I can't figure out what's going on memory-wise. Where and how is the struct value t copied? interface ITest { void Hello(); } struct STest : ITest { public void Hello() { Console.WriteLine("Hello"); } } static ITest Make() { STest t = new STest(); return t; } static void Main(string[] arg...
Imagine an interface heirarchy like this: public interface IAnimal { string Color { get; } } public interface ICat : IAnimal { } In this case, ICat 'inherits' IAnimal's Color property. Is it possible to add an attribute to the ICat's Color property, without adding it to the IAnimal? The following is an example of what I am try...
I am a learner of C#.Can you please explain me what is the difference between assigning a collection to interface. I see some examples,initialize List<int> few = new List<int>() { 12, 123, 211, 200 }; But some assign collection to interface IList<int> someList=new List<int>(){12,23,56,78}; When would we need the later one?.Pros an...
Hi All: Suppose I've got 2 different modules which have the uniform(same) interfaces. The files list like this: root/ logic.py sns_api/ __init__.py facebook/ pyfacebook.py __init__.py myspace/ pymyspace.py __init__.py And pyfacebook.py and pymyspace.py have the same inte...
I have an interface, IFindable that is implemented by a few classes. One other World class holds a List<IFindable> items; I have set up a getItems method in my World class, to return the list of IFindables. Now, I am trying to access that list from my Default.aspx.cs class (this is a web project). Unfortunately, I don't seem to be ab...
I have an interface called IAddress, and a class called Address that handles street, city, state/province, postal code and country. I have a couple of Linq2Sql classes that has all the address information and would like to implement the interface IAddress, and pass that in to the constructor for Address that would the load the property v...
Hello, I need to make some vertical docking/collapsible panels in the style of the Visual Studio IDE (like Solution explorer, Toolbox, Properties, etc...), does anyone know some examples or code for doing that? Thanks, R. ...
I'm trying to fix a design flaw that I recently ran across in some of our software without re-writing the entire thing. There is a .exe which has a message listener thread that is receiving data from some server, and then writing it to a class in a seperate DLL (we'll call it StaticDataClass) that is storing all of the data it receives ...
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 bunch of class who implement a common interface : Command. And this bunch of class goes to a Map. To get the Map working correctly, I need to each class who implements Command to override the Object.equals(Object other) method. it's fine. But i whould like to force the overriding of equals. => Have a compilation error when ...
What are the new collection interfaces available in C# 3.0 ? In C# 2.0 IComparer IEqualityComparer IEnumerator IEnumerable ICollection IDictionary IDictionaryEnumerator IList. ...
The issue appears is when I have a class implementing an interface, and extending a class which implements an interface: class Some : SomeBase, ISome {} class SomeBase : ISomeBase {} interface ISome{} interface ISomeBase{} Since typeof(Some).GetInterfaces() returns and array with ISome and ISomeBase, i'm not able to distinguish if ISo...