Açıklaması C# IStructuralEquatable Nasıl kullanılır Hakkında 5 Basit Tablolar

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That is, you yaşama create your own definition of structural equality and specify that this definition be used with a collection type that accepts the IStructuralEquatable interface.

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

IStructuralEquatable is an interface in C# that defines methods for determining whether two objects are structurally equal. It's often used in scenarios where you want to compare the structure of objects, typically within collections, and not just compare references or individual values.

Although I think the gains from not boxing will be less than the cost for having CanEqual. In that case you should seal your types and you no longer need CanEqual. Sealing also katışıksız some performance benefits.

comparer IEqualityComparer An object that determines whether the current instance and other are equal.

If those objects do derece contain equality/hashcode methods that satisfy that contract, you will have C# IStructuralEquatable nerelerde kullanılıyor to wrap them and provide correct implementations for those methods yourself in the wrapper.

Fakat, articles1 ve articles3 dizileri aynı makale çıbanlıklarına farklı sıralarda malik olduğundan, CompareTo metodu farklı bir porte döndürür ve bu dizilerin yapısal olarak denktaş olmadığını belirtir.

(doesn't violate documentation), but it is clearly derece as good birli it would be if 0 were replaced with i. Also there's no reason to loop if the code were just going to use a single value from the array.

I had the same question. When I ran LBushkin's example I was surprised to see that I got a different answer! Even though that answer katışıksız 8 upvotes, it is wrong. After a lot of 'reflector'ing, here is my take on things.

GitHub'da bizimle ortaklık kuruluşn Bu hapishaneğin kaynağı GitHub'da bulunabilir; burada ayrıca problemlerı ve çekme isteklerini oluşturup gözden geçirebilirsiniz. Henüz bir küme malumat sinein yardımda kâin kılavuzumuzu inceleyin.

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

Being able to specify IStructuralEquatable/IStructuralComparable in such cases is actually useful. It would also be inconvenient to pass a TupleComparer or ArrayComparer everywhere you want to apply this type of comparison. The two approaches are not mutually exclusive.