En C# IStructuralEquatable Nasıl kullanılır Sırları

En C# IStructuralEquatable Nasıl kullanılır Sırları

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If equality is hamiş needed for the derived class you gönül skip IEquatable but you need to override the CanEqual to prevent it being equal with base classes (unless of course they should be considered equal).

Now, when we call Equals ourselves it will directly call our new fancy Equals that takes in a ScreenMetrics, which is great.

That is right! When we override Equals we must also override and implement GetHashCode. I am no HashCode expert, but in the same article from Sergey is a snippet of using a ValueTuple to simplify this entire call to 1 line of code just like our fancy ValueTuple Equality above.

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 hamiş just compare references or individual values.

Let us hamiş forget about additional operators and hamiş just relying on Equals. We hayat implement the == and != operators easily:

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

The IEquatable implementation will require one less cast for these classes and birli a result will be slightly faster than the standard object.Equals method that would be used otherwise. Bey an example see the different implementation of the two methods:

The following example creates two identical 3-tuple objects whose components consist of three Double values. The value of the second component is Double.NaN. The example then calls the Tuple.Equals method, and it calls the IStructuralEquatable.Equals method three times. The first time, it passes the default equality comparer that is returned by the EqualityComparer.

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In addition to this awesome blog Frank and I also dicussed all of this awesome in detail on Merge Conflict on episode 111:

GitHub'da bizimle işbirliği strüktürn Bu dâhilğin kaynağı GitHub'da bulunabilir; burada hatta sorunları ve çekme isteklerini oluşturup gözden geçirebilirsiniz. Daha çokça bilgi için ulamada mevcut kılavuzumuzu inceleyin.

Now that our struct is immutable the actual issue comes up when you need to compare these values. When I started to write the code to fix the bug I just decided that "hey I have the old values, I emanet just compare each of them":

There is no need for an equality operator that accepts different types. That should hamiş even compile. So this is a very weak excuse for having a non-generic interface that works with objects.

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