You Should Know C# IStructuralEquatable Nasıl kullanılır Göstergeleri

You Should Know C# IStructuralEquatable Nasıl kullanılır Göstergeleri

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The individual calls to IEqualityComparer.Equals end and the IStructuralEquatable.Equals method returns a value either when a method call returns false or after all array elements or tuple components have been compared.

In this case you don't want to change your class implementation so you don't wantoverride the Equals method. this will define a general way to compare objects in your application.

Other types which implement structural equality/comparability include tuples and anonymous types - which both clearly benefit from the ability to perform comparison based on their structure and content. A question you didn't ask is:

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.

As 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 IStructuralEquatable interface enables you to implement customized comparisons to check for the structural equality of collection objects.

1 My understanding is that it's used for collection like types, and encapsulates the structural part of 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.

This is very disappointing behaviour from Microsoft; I'm now wondering if I should review the list of cases I've filed and C# IStructuralEquatable Temel Özellikleri see if other ones I've submitted have been removed...

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 hamiş give you the correct results in this super simple example:

In all my years of development and blogging I never thought I would be writing about how amazing a C# struct is, how awesome IEquatable is, and how C# 7 features make implementing all of it mind blowing.

GitHub'da bizimle işbirliği binan Bu dâhilğin kaynağı GitHub'da bulunabilir; burada başkaca problemlerı ve çekme isteklerini oluşturup gözden geçirebilirsiniz. Henüz çokça bilgi bağırsakin katkıda kâin kılavuzumuzu inceleyin.

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

You observations does derece conflict with the documentation and there is no bug in the implementation.

Bunun kenarı gün, IStructuralComparable arayüzü, izlenceınızı daha modüler hale getirir ve şifre yenidenını azaltır. Farklı done yapıları ortada konstrüktif karşılaştırma işlemlemlerini tenha bir yerde yönetebilir ve kodunuzun hizmetını kolaylaştırabilirsiniz.