C# IStructuralEquatable nedir Ile ilgili detaylı notlar

C# IStructuralEquatable nedir Ile ilgili detaylı notlar

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It differs from reference equality, which indicates that two object references are equal because they reference the same physical object.

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.

Bildiğiniz kadar new operatörü classlarda kullanıldığı dönem alakalı classtan bir nesne dilek edilmekte ve üretilen nesne belleğin Heap kısmında korunum edilmektedir.

– Royi Namir Commented Mar 3, 2012 at 18:04 @RoyiNamir user844541's answer is correct, but maybe it is still hard for you to understand without a concrete example, if you are familiar with IEqualityComparer and how it is used by Linq's Distinct(), then after check the source code to see how it implement IStructuralEquatable on referencesource.microsoft.com/#mscorlib/system/collections/…, then you will see how it work.

1 My understanding is that it's used for collection like types, and encapsulates the structural part of the comparison, but leaved the C# IStructuralEquatable nedir comparison of the elements to a comparer passed in by the user. But I'm derece really sure if I really got it.

Consider that there are only ~4.2 billion different hashcodes. Gönül you create more than this many different objects of the type on which GetHashCode is called? In this case it is easy to see the answer is "yes". So GetHashCode is a sort of compressing projection onto a smaller seki - there are bound to be duplicates.

Reading through the excellent blog post by Sergey on struct equality performance he mentions that the default implementations are pretty slow and using boxing for each member. Additionally, he mentions that a memory comparison may not give you the correct results in this super simple example:

Task oluşturmanın alışverişlemci üzerinde maliyeti vardır ve çok kesik devam eden fiillemler ciğerin bir task tekvin etmek genelde daha yavaş çkırmızıışan uygulamalara saika olabilir.

Amma velakin bu prodüksiyonız class derece kompleks emeklemler karınin tasarlanmış bir yapı gerektirmiyorsa ve tutulacak verileri enkapsüle buyurmak yetiyorsa ahacık bu biçim durumlarda struct yapkaloriı tercih edebiliriz.

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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. Kakım the output from the example shows, the first three method calls return true, whereas the fourth call returns false.

While writing my own immutable ByteArray class that uses a byte array internally, I implemented the IStructuralEquatable interface.