I've created a generic wrapper for using the Cache object: public class Cache<T> where T : class { public Cache Cache {get;set;} public CachedKeys Key {get;set;} public Cache(Cache cache, CachedKeys key){ Cache = cache; Key = key; } public void AddToCache(T obj){ Cache.Add(Key.ToString(), ...
So, I have a class with a constructor like this: public FilterList(Set<Integer> labels) { ... } and I want to construct a new FilterList object with an empty set. Following Joshua Bloch's advice in his book Effective Java, I don't want to create a new object for the empty set; I'll just use Collections.emptySet() instead: FilterL...
The following code is giving me an error: // GetDirectoryList() returns Dictionary<string, DirectoryInfo> Dictionary<string, DirectoryInfo> myDirectoryList = GetDirectoryList(); // The following line gives a compile error foreach (Dictionary<string, DirectoryInfo> eachItem in myDirectoryList) The error...
Hi, i would like to get the type of the derived class from a static method of its base class. How can this be accomplished? Thanks! class BaseClass { static void Ping () { Type t = this.GetType(); // should be DerivedClass, but it is not possible with a static method } } class DerivedClass : BaseClass {} // somewhere in the...
I have written a generic type: IDirectorySource<T> where T : IDirectoryEntry, which I'm using to manage Active Directory entries through my interfaces objects: IGroup, IOrganizationalUnit, IUser. So that I can write the following: IDirectorySource<IGroup> groups = new DirectorySource<IGroup>(); // Where IGroup implements `IDirectoryEnt...
Currently i am using reflection with sql. I find if i want to make a specialize query it is easiest to get the results by creating a new class inheriting from another and adding the 2 members/columns for my specialized query. Then due to reflections in the lib in my c# code i can write foreach(var v in list) { v.AnyMember and v.MyExtraMe...
Please see http://stackoverflow.com/questions/211143/java-enum-definition and http://stackoverflow.com/questions/3061759/why-in-java-enum-is-declared-as-enume-extends-enume for general discussion. Here I would like to learn what exactly would be broken (not typesafe anymore, or requiring additional casts etc) if Enum class was defined a...
I want to create a specific generic method in Scala. It takes two parameters. The first is of the type of a generic Java Interface (it's from the JPA criteria query). It currently looks like this: def genericFind(attribute:SingularAttribute[Person, _], value:Object) { ... } // The Java Interface which is the type of the first paramet...
IDictionary<TKey, TValue> inherits from IEnumerable<KeyValuePair<TKey, TValue>>, but IDictionary for some reason doesn't inherit from IEnumerable<DictionaryEntry>. I wonder why? I hate to write this ugly .OfType<DictionaryEntry>() every time when I need to make a query against an IDictionary. ...
This is a bit of noob question - I'm still fairly new to C# and generics and completely new to predicates, delegates and lamda expressions... I have a class 'Enquiries' which contains a generic list of another class called 'Vehicles'. I'm building up the code to add/edit/delete Vehicles from the parent Enquiry. And at the moment, I'm sp...
Hi, I was wondering is there an elegant way of geting string[] from List<Tuple<int, int, string>>? I'm thinking of .NET way (preferable extension methods and lambda expressions :P) P.S. Code is from .NET 3.5 project, so Tuple is my own implementation. ...
The Problem It's something I came across a while back and was able to work around it somehow. But now it came back, feeding on my curiosity - and I'd love to have a definite answer. Basically, I have a generic dgv BaseGridView<T> : DataGridView where T : class. Constructed types based on the BaseGridView (such as InvoiceGridView : Bas...
using System; using Castle.Windsor; using Castle.MicroKernel.Registration; using System.Reflection; using Castle.MicroKernel.Resolvers.SpecializedResolvers; namespace Windsor { class MainClass { public static void Main (string[] args) { var container = new WindsorContainer (); container.R...
I have a lot of functions which are currently overloaded to operate on int and string: bool foo(int); bool foo(string); bool bar(int); bool bar(string); void baz(int p); void baz(string p); I then have a lot of functions taking 1, 2, 3, or 4 arguments of either int or string, which call the aforementioned functions: void g(int p1) ...
I'd like do implement a generic function with the generic constraint that the Type passed in is an interface. Is this possible in C#? I have it working fine without the constraint, but the code will fail at runtime if it is not an interface, so I'd like to have the compile time checking. public T MyFunction<T> where T : {any interface...
Suppose I have two functions: Foo(params INotifyPropertyChanged[] items) { //do stuff } Foo<T>(IEnumerable<T> items) where T : INotifyPropertyChanged { Foo(items.ToArray(); } The second one allows me to call Foo from a generic class with the constraint where T : INotifyPropertyChanged, but the second resolves to itself so I get...
hey guys, I'm using automapper version 1.1.0.188 In my AutoMapper.Configure I'm mapping Entities to DTOs and vice versa, like so: // entity >> DTO Mapper.CreateMap<MetaTemplate, MetaTemplateDTO>(); Mapper.CreateMap<Person, PersonDTO>(); // DTO >> Entity Mapper.CreateMap<MetaTemplateDTO, MetaTemplate>(); Mapper.CreateMap<PersonDTO...
I have a number of EventArgs classes with only one field and an appropriate property to read it: public class SomeEventArgs : EventArgs { private readonly Foo f; public SomeEventArgs(Foo f) { this.f = f; } public Foo Foo { get { return this.f; } } } Is there any built-in, generic class t...
So I've been fighting another memory problem in my project for the past week. I tried a couple of memory profilers but nothing gave me insight into what was causing the minor memory leak. The following code turned out to be causing it: private void DeleteAll( FlowLayoutPanel flp) { List<ImageControl> AllList = GetAllList(flp); L...
I've got some old command-line argument parsing code I wrote 4 years ago for Java 5, and it won't compile in Java 6 thanks to changes in how generics are handled and/or whether certain library classes are generic. While trying to fix it, I came across the following problem; since it's been 4 years since I've touched Java and I was never...