5 Basit Teknikleri için C# IStructuralEquatable nerelerde kullanılıyor

5 Basit Teknikleri için C# IStructuralEquatable nerelerde kullanılıyor

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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.

Reference types (read classes) don't benefit kakım much. The IEquatable implementation does let you avoid a cast from System.Object but that's a very trivial gain. I still like IEquatable to be implemented for my classes since it logically makes the intent explicit.

Daniel A.A. PelsmaekerDaniel A.A. Pelsmaeker 49.2k2121 gold badges112112 silver badges160160 bronze badges 5 In addition to answers which point to duplicate hashcodes as is documented behavior, some reasoning and reflection would also lead you to the same conclusion.

It is used by the third example kakım an argument to the Equals(Object, IEqualityComparer) method of the IStructuralEquatable interface that tuples implement. It compares two Double or two Single values by using the equality operator. It passes values of any other type to the default equality comparer.

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 tuple to an IStructuralEquatable interface value and providing your IEqualityComparer implementation kakım an argument to the Equals method, you güç define a custom equality comparison for the array or collection.

1 My understanding is that it's used for collection like types, and encapsulates the structural part of C# IStructuralEquatable Nasıl kullanılır the comparison, but leaved the comparison of the elements to a comparer passed in by the user. But I'm not really sure if I really got it.

Fakat, articles1 ve articles3 dizileri aynı makale mirlıklarına farklı sıralarda iye olduğundan, CompareTo metodu farklı bir değer döndürür ve bu dizilerin strüktürel olarak tay olmadığını belirtir.

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Strüktürel denklik, hemayar bileğerlere malik oldukları bâtınin dü nesnenin tay olduğu anlamına gelir. Aynı fiziki nesneye temelvurdıkları bağırsakin iki nesne başlangıçvurusunun müsavi olduğunu gösteren müracaat eşitliğinden değişikdır. arabirimi, IStructuralEquatable koleksiyon nesnelerinin konstrüktif eşitliğini denetlemek için özelleştirilmiş muhaliflaştırmalar uygulamanıza imkân tanır.

Amma velakin bu imalız class derece kompleks işlemlemler kucakin tasarlanmış bir yapı gerektirmiyorsa ve tutulacak verileri enkapsüle buyurmak yetiyorsa ahacık bu ezgi durumlarda struct yapkaloriı tercih edebiliriz.

Do not send hash codes across application domains or processes. In some cases, hash codes may be computed on a per-process or per-application domain basis.

GetHashCode does derece return unique values for instances that are derece equal. However, instances that are equal will always return the same hash code.

The Equals method supports custom structural comparison of array and tuple objects. This method in turn calls the comparer object's IEqualityComparer.Equals method to compare individual array elements or tuple components, starting with the first element or component.