Için basit anahtar C# IStructuralEquatable Kullanımı örtüsünü

Için basit anahtar C# IStructuralEquatable Kullanımı örtüsünü

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Keep in mind that for this interface to work correctly, the types within the collection or structure must also implement IStructuralEquatable or provide their own structural equality logic.

= to provide value equality checks (vs the default reference equality check). The MSDN documentation suggests you only do it for immutable types. There are also issues involving interfaces and operator overloading.

If you want to implement IEquatable in a class hierarchy you güç use the following pattern. It prevents derived (including sibling) classes from being equal.

Default property. The second time, it passes the default equality comparer that is returned by the StructuralComparisons.StructuralEqualityComparer property. The third time, it passes the custom NanComparer object. As the output from the example shows, the first three method calls return true, whereas the fourth call returns false.

Birli an example, it might make sense for two different instances of an Employee class to be considered equal if they both represent the same entity in your system.

The generic tuple classes (Tuple, Tuple, Tuple, and so on) and the Array class provide explicit implementations of the IStructuralEquatable interface. By casting (in C#) or converting (in Visual Basic) the current instance of an array or C# IStructuralEquatable nerelerde kullanılıyor tuple to an IStructuralEquatable interface value and providing your IEqualityComparer implementation bey an argument to the Equals method, you birey define a custom equality comparison for the array or collection.

The IStructuralEquatable interface enables you to implement customized comparisons to check for the structural equality of collection objects. This is also made clear by the fact that this interface resides in the System.Collections namespace.

Defines a generalized method that a value type or class implements to create a type-specific method for determining equality of instances.

Başka bir ifadeyle, kendi strüktürel müsavat tanılamamınızı oluşturabilir ve bu tanılamamın arabirimi ikrar IStructuralEquatable eden bir derme türüyle kullanılacağını belirtebilirsiniz. Arabirimin iki üyesi vardır: Equals, belirtilen IEqualityComparer bir uygulamayı kullanarak eşitliği sınav paha ve GetHashCodeeşit olan nesneler muhtevain aynı katışık kodları döndürür.

Bu örnekte, articles1 ve articles2 dizileri aynı makale kellelıklarına aynı tam sahip başüstüneğundan, CompareTo metodu 0 döndürerek bu dizilerin strüktürel olarak müsavi bulunduğunu belirtir.

GitHub'da bizimle işbirliği strüktürn Bu hapishaneğin kaynağı GitHub'da bulunabilir; burada ayrıca sorunları ve çekme isteklerini oluşturup gözden geçirebilirsiniz. Henüz ziyade bilim sinein ulamada bulunan kılavuzumuzu inceleyin.

The contract of Equals differs from that of IStructuralEquatable, in that it indicates whether 2 objects are logically equal.

There is no need for an equality operator that accepts different types. That should not even compile. So this is a very weak excuse for having a non-generic interface that works with objects.

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