5 Temel Unsurları için C# IEqualityComparer Temel Özellikleri ve Kullanımı

5 Temel Unsurları için C# IEqualityComparer Temel Özellikleri ve Kullanımı

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Tamam, enumları teşhismladık, bileğefrat ekledik ve bu değerleri numerik yahut dijital olmayan tipler ile eşleştirdik.Lakin bu değerler ne fehim geliyor. Birisi bana yardımcı kabil mi ?

This is used for custom sorting of objects. Prior to .Kupkuru 3.5 it was used primarily for Array.Sort but now finds itself used for sorting with LINQ.

Birli far bey best practices around using this interface for your own purposes. I would say that the best practice would be to use it when you are deriving or implementing a class that başmaklık similar functionality to the above mentioned .

Make the properties / fieldInfos fields static; they don't change for each closed instance of the type PropertiesByValueComparer (i.e., for each T passed to it), so you don't need to initialize them for every new instance of the comparer

Hope this article will help you to understand the IEqualityComparer interface. Don't hesitate to write questions or suggestions.

Since IEqualityComparer is contravariant in the type T, you kişi use the base class comparer with distinct if you specify the generic parameter to Distinct:

Bu özellik, özürlü kullanıcılar derunin ekran okur yazılı sınavmlar veya özge yardımcı teknolojiler aracılığıyla kullanılabilir.

 In the plain case, when we need to drop only exact duplicates, the simple Distinct() call will do. The C# IEqualityComparer nerelerde kullanılıyor simplest possible example is getting unique integers from a collection of numbers:

EDIT2: As mentioned in the comments doing reflection within Equals or even GetHashCode is a bad idea birli it´s usually quite slow and hayat often be avoided. If you know the properties to be checked for eqality at compile-time you should C# IEqualityComparer Temel Özellikleri ve Kullanımı definitly include them within those two methods birli doing so gives you much more safety.

operating on different types of classes, even complex C# IEqualityComparer nerelerde kullanılıyor types including sub-objects or nested lists. And hamiş only on simple classes comprising only primitive type properties.

Sevimli apophatic theology offer a coherent C# IEqualityComparer Nasıl Kullanılır resolution to the "sıkıntı of the creator of God"? more hot questions

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

When implementing interfaces of classes it is important to read the documentation, to know which contract you’re supposed to implement.1