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  • c# ProcessCmdKey overload, match generic combination

    - by leo
    Hi all, On some control, I want ProcessCmdKey to return true if the keys pressed by the user were ALT and any letter of the alphabet. I'm able to return true if the user presses Alt with the following code, but how can I add the condition of a letter also pressed ? protected override bool ProcessCmdKey(ref Message msg, Keys keyData) { if ((keyData & Keys.Alt) != 0) { return true; } } Thanks.

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  • C#, Using Custom Generic Collection faster with objects than List

    - by Kaminari
    Hello, I'm using for now List< to iterate through some object collection and find matching element, The problem is that object has only 2 significant values Name and Link (strings) but has some other values wich I dont want to compare. I'm thinkig about using something like HashSet (wich is exactly what I'm searching for - fast) from .NET 3.5 but target framework has to be 2.0. There is something called Power Collections here: http://powercollections.codeplex.com/ But maybe there is other way? If not, can you suggest me a suitable custom collection?

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  • Programming Interview Preparation Book

    - by kunjaan
    Which programming book prepared you the most of interview questions? My friend recommended these: Interview Questions Exposed Career Cup's Book What does this community recommend for someone preparing for an entry level software development/ internship interview questions?

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  • Comparing the values of two generic Numbers

    - by PartlyCloudy
    I want to compare to variables, both of type T extends Number. Now I want to know which of the two variables is greater than the other or equal. Unfortunately I don't know the exact type yet, I only know that it will be a subtype of java.lang.Number. How can I do that? Thanks!

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  • Programming mobile devices

    - by sax
    I love desktop and web programming, but I would like to be able to program some sort of small device I can then carry with me. Most mobile phones are quite hard to create programs for as they want you to buy the things they offer instead. What mobile-phone/gameboy size devices would be suitable for my goal?

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  • Why isn't the new() generic constraint satisfied by a class with optional parameters in the construc

    - by Joshua Flanagan
    The following code fails to compile, producing a "Widget must be a non-abstract type with a public parameterless constructor" error. I would think that the compiler has all of the information it needs. Is this a bug? An oversight? Or is there some scenario where this would not be valid? public class Factory<T> where T : new() { public T Build() { return new T(); } } public class Widget { public Widget(string name = "foo") { Name = name; } public string Name { get; set; } } public class Program { public static void Main() { var widget = new Widget(); // this is valid var factory = new Factory<Widget>(); // compiler error } }

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  • Using NetBeans for multiple programming languages

    - by mawg
    I am looking for a cross platform RAD IDE with GUI building. NetBeans looks right (or am aI wrong?). However, I may want to code somethings in C++ and some in Python. It looks like both are supported, but I am not sure if I need to install two copies of NetBeans or if one can handle both programming languages. Sorry it's such a st00pid n00b question - can anyone tell me quickly? Thanks

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  • A strange error in java generic.

    - by ???
    This is ok: Class<? extends String> stringClass = "a".getClass(); But this gets error: <T> void f(T obj) { Class<? extends T> objClass = obj.getClass(); } I know I can cast it like: <T> void f(T obj) { @SuppressWarnings("unchecked") Class<? extends T> objClass = (Class<? extends T>) obj.getClass(); } But why the previous error? Will the next release of Java 7 will support such usage?

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  • Overriding inherited generic methods

    - by jess
    I have this code in base class protected virtual bool HasAnyStuff<TObject>(TObject obj) where TObject:class { return false; } In child class I am overriding protected override bool HasAnyStuff<Customer>(Customer obj) { //some stuff if Customer.sth etc return false; } I am getting this error '''Type parameter declaration must be an identifier not a type''' What is it I am doing wrong here?

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  • C# Possible to have a generic return type?

    - by JL
    Here is a typical function that returns either true/false; private static bool hasValue() { return true; } Now on an error, I would like to return my own custom error object with definition: public class Failure { public string failureDateTime { get; set; } public string failureReason { get; set; } } I would have expected to be able to throw this custom object for example... private static bool hasValue() { throw new Failure(); } This is not possible, and I don't want to derive Failure from System.IO.Exception because of the inability to serialize an exception in C#. What is the best practice / or ideal solution to this problem. Should I just work with private static object? Or is there a cleaner way to return a custom object or bypass the typical return type on an error (not using System.IO.Exception)? Not entirely wild about object either, because then I need to cast the result and validate it by more boolean logic.

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  • Generic DRM (Distributed resource management) wrapper

    - by Pavel Bernshtam
    I need to write a software, which launches DRM jobs in a customer environment and monitors those jobs status. It should work with various customer environments and DRMs - like LSF, Sun Grid and others. Can you recommend some 3rd party library, which hides DRM differences from me and has API like "launch job", "get list of jobs", "get job status" etc. ? Both Java and native libraries are good for me.

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  • C# determining generic type

    - by Chris Klepeis
    I have several templated objects that all implement the same interface: I.E. MyObject<datatype1> obj1; MyObject<datatype2> obj2; MyObject<datatype3> obj3; I want to store these objects in a List... I think I would do that like this: private List<MyObject<object>> _myList; I then want to create a function that takes 1 parameter, being a datatype, to see if an object using that datatype exists in my list.... sorta clueless how to go about this. In Pseudo code it would be: public bool Exist(DataType T) { return (does _myList contain a MyObject<T>?); }

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  • How to create a generic Android XML layout for all activities

    - by zabawaba
    I have an application that needs the same items [5 buttons acting as tabs] in every screen. Is it possible to create a "base XML layout" that has these 5 buttons and then have all the other XML files extend from the bas layout in some way so that I don't have to have multiple buttons that will ultimately have the same functionality. Is there a better approach to this problem that can be supported by API 9

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  • How online-game clients are able to exchange data through internet so fast?

    - by Kirzilla
    Hello, Let's imagine really simple game... We have a labirinth and two players trying to find out exit in real time through internet. On every move game client should send player's coordinates to server and accept current coordinates of another client. How is it possible to make this exchange so fast (as all modern games do). Ok, we can use memcache or similar technology to reduce data mining operations on server side. We can also use fastest webserver etc., but we still will have problems with timings. So, the questions are... What protocol game clients are usually using for exchanging information with server? What server technologies are coming to solve this problem? What algorithms are applied for fighting with delays during game etc. PS: Sorry for my English and I hope that my question is clear. Thank you.

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  • iphone programming getting data from remote server

    - by user320023
    HI, I'm new to iphone programming and developing travel application, which retrieve most of it data from remote database. What is the best way to implement this solution? I thought of generating XML files in server side and getting data via XML files to iPhone app and displaying them... Is there better implementation to this, thank you in advance? Waruna.

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  • Generic collection class?

    - by Mark
    Is there anyway I can do this? class TSOC<TCollection, TValue> : ICollection<TValue>, INotifyCollectionChanged where TCollection : ICollection { private TCollection<TValue> collection; } It doesn't like my definition of collection. I'd prefer the definition to look like TSOC<TCollection> where the user can pass in List<int> or something, but then I need to pull out the "int" to know what interface to implement.

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  • How Can I Accept a Generic Class and Use Its Properties / Methods

    - by Blake Blackwell
    I want to create a class that could hold any of a number of same type of classes. For example lets says I have a base class like follows: public class BaseClass { public string MyBaseString { get; set; } } And then I have a few derived classes like this: public class DerivedClass : BaseClass { public MyDerivedClassString { get; set; } } public class DerivedClass2 : BaseClass { public MyDerivedClass2String { get; set; } } Now I would like a class that accepts one of these implementations and does stuff with it. Here is the only thing I can think of, but there must be a better way: public class ClassA { public object MyClass { get; set; } public ClassA (object myClass) { MyClass = myClass; if (object is BaseClass) { //do something } else if (object is DerivedClass) { //do something specific to derived class } else if (object is DerivedClass2) { //do something specific to derived class 2 } } } I'm not sure really what I'm looking for here. Any ideas would be great!

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  • Dispatching generic tasks in WCF or .Net Remoting

    - by Eric
    Hello all, I've been researching for a couple days on and off, and have yet to figure out the best way to achieve the following goal. I would like to define either an interface or abstract class in C# which has an associated Run method, similar to the Java runnable interface. The goal would be to have a shared queue which contains a list of these objects. Then individual clients would be able to derive their own concrete runnable classes and add them to the queue hosted by the server. Clients would also be able to pop these runnable objects off the queue and execute them arbitrarily. This seems like it should be feasible in a VM based language without needing to place any of the concrete implementations in a shared assembly, but I have thus far had no luck finding a working example of such a system. Does anyone know how this might be achieved?

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  • Can I do Android Programming in C++ ,C

    - by user333472
    Can I do Android Programming in C++ ,C ? If ( answer == "yes" ) { then please tell how ? and whats the procedure for set-up ? ( i donot know obj-c ,java ) but well versed in C,C++ ,FLASH AS3 SDK released by google please do not tell about NVDIA SDK its not fully developed :) }

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