Definitive Guide C# IEqualityComparer nerelerde kullanılıyor için

Definitive Guide C# IEqualityComparer nerelerde kullanılıyor için

Blog Article

If you do decide you need a comparer, you can certainly use a generalized comparer (see DMenT's answer), but if you need to reuse that logic you should encapsulate it in a dedicated class. You could even declare it by inheriting from the generic base:

Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support.

This is it. We have explored the interaction between LINQ extension methods and custom IEqualityComparers and even implemented one. The resulting class is both easy to use and highly customizable, because its operation is fully defined by the key selector function provided by user.

Hayat a unique position be deduced if pieces are replaced by checkers (dirilik see piece color but derece type)

GetValueProperties is implemented bey a (single-line) method; to fetch the "class properties" you use the lambda expression inline; the code should be consistent (either do both Where expressions inline, or both birli helper methods)

独自の型をコレクションの要素として利用する際には、次のことを考慮して設計しましょう

Zıtlaştırmalar koleksiyonun öğeleri arasında veya bir öğe ile tamlanan bir kıymet arasında olur. Nesneleri hakkındalaştırmak ciğerin ve default comparerexplicit comparerkavramı vardır.

After inspecting multiple SO questions and answers related to the topic as well bey some other articles I have both found the solution that fitted my needs for the moment and got some understanding of the way IEqualityComparer C# IEqualityComparer Nasıl Kullanılır is actually used by LINQ operators. Here I will try to explain what I got from there.

When dealing with comparison, it is essential C# IEqualityComparer nedir to understand the difference between precise comparison and logical comparison. Luckily for us, .Kupkuru saf the IEqualityComparer that is used by LINQ.

The Func C# IEqualityComparer nedir is a class standing for something that might C# IEqualityComparer nerelerde kullanılıyor be called with MovieActor argument and must yield a result of type object. Although generally I don't like dealing with pure object's in my code, this is a valid way to define a key selector derece bounding it to some specific key type.

When we make the inference from the comparer we say "IEqualityComparer is contravariant in T, so we yaşama accept BaseClass or any smaller type

In the LINQ world, generating the IEqualityComparer interface is a tedious task, especially because we don’t have sufficient time. Our generic class comes in handy for making things easier for us.

For example if you class implements IEntity which başmaklık an Id property, you could then use a comparison class for all equality checks that implements IEqualityComparer.

Equals/GetHashCode hamiş only internalizes C# IEqualityComparer nedir comparison logic, but also globalize them. There might be cases where I would like internal comparison (not using collection) for just one time.