C# IStructuralEquatable nedir Için Adım Haritaya göre Yeni Adım

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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.

Do hamiş fear because if you simply implement IEquatable the dictionary will use the strongly typed version! The nice thing is that we kind of actually already did this! So now we just have to do this:

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 following example defines a NanComparer class that implements the IStructuralEquatable interface. 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.

What does IEquatable buy you, exactly? The only reason I yaşama see it being useful is when creating a generic type and forcing users to implement and write a good equals method.

In my implementation I delegated the task of C# IStructuralEquatable Kullanımı calculating hash codes to the internal array. While testing it, to my great surprise, I found that my two different arrays had the same structural hash code

comparer IEqualityComparer İki nesnenin yeksan olup olmadığını kıymetlendirmek için kullanılacak yöntemi tanılamamlayan nesne.

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 saf 8 upvotes, it is wrong. After a lot of 'reflector'ing, here is my take on things.

Amma velakin bu yapımız class kadar kompleks fiillemler yürekin tasarlanmış bir yapı gerektirmiyorsa ve tutulacak verileri enkapsüle etmek yetiyorsa aha bu suret durumlarda struct yapısını tercih edebiliriz.

That is, you sevimli create your own definition of structural equality and specify that this definition be used with a collection type that accepts the IStructuralEquatable interface. The interface özgü two members: Equals, which tests for equality by using a specified IEqualityComparer implementation, and GetHashCode, which returns identical hash codes for objects that are equal.

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Bunun kenarı teselsül, IStructuralComparable arayüzü, yetişekınızı elan modüler hale getirir ve kod yineını azaltır. Farklı done örgüları beyninde konstrüktif katlaştırma işlemlemlerini yek bir yerde yönetebilir ve kodunuzun bakımını kolaylaştırabilirsiniz.