covariance

相关标签：javascript jquery android 多少钱 iPhone

Why .NET 4 variance for generic type arguments not also for classes? [duplicate]

This question already has answers here: Closed 12 years ago. Possible Duplicates: Why isn't there generic variance for classes 开发者_运维技巧in C# 4.0?[详细]

2023-01-18 13:56 分类：问答
Entity Framework: ObjectSet and its (generics) variance

I use: EntityFramework + POCO Here is the thing: public interface IBaseType { int Id { get; set; } } public class BaseType : IBaseType[详细]

2023-01-15 23:26 分类：问答
Build failure in unit test project with accessors of a project containing covariant types

I added a covariant interface to our project: interface IView { } interface IPresenter<out TView> where TView : IView[详细]

2023-01-15 01:14 分类：问答
Mnemonic for C# generic types

I often forget if i have to use in or out when defining covarient and contravarient generic types. In java i have the mnemonic PECS (producer extends consumer super) to help me. Do you know a similar[详细]

2023-01-14 10:06 分类：问答
Examples of good, real-life use-cases for covariance and contravariance in C# 4.0?

Before C# 4.0 came out, I was quite excited about covariance and contravariance. It pandered to my fondness for theoretical correctness![详细]

2023-01-13 14:49 分类：问答
Override a Property with a Derived Type and Same Name C#

I\'m trying to override a property in a base class with a different, but derived type with the same name. I think its possible by covarience or generics but am not sure how to do it?[详细]

2023-01-12 23:18 分类：问答
Why is C# 4.0's covariance/contravariance limited to parameterized interface and delegate types?

Is this a limitation of the CLR or are there compatibility concerns with existing code? Is this related to the messed up variance of delegate combining in C# 4.0?[详细]

2023-01-10 00:08 分类：问答
A design problem involving Collections, Generics and Interfaces in C#

This post contains a lot of code, but I would really appreciate it if you took the some to read and understand it...and hopefully come up with a solution[详细]

2023-01-09 06:40 分类：问答
Contra- and Co-variance - CLR via C#

In the CLR via c# third edition there is an example that I cant seem to make sense of: Invariant Meaning that that generic[详细]

2023-01-09 01:51 分类：问答
Covariance matrix computation

Input : random vector X=xi, i=1..n. vector of means for X=meanxi, i=1..n 开发者_C百科 Output : covariance matrix Sigma (n*n).[详细]

2023-01-08 03:51 分类：问答