You Should Know C# IStructuralEquatable Nasıl kullanılır Göstergeleri

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

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. The best example of this is arrays, which with .Kemiksiz 4 now implement the IStructuralEquatable interface. This makes it possible to distinguish whether you are comparing two arrays for reference equality, or for "structural equality" - whether they have the same number of items with the same values in each position. Here's an example:

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.

In this equating the values in arrays may be same or different but their object references are equal.

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

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.

Defines a generalized method that a value type or class implements to create a type-specific method for determining equality of instances.

Ayrıksı bir ifadeyle, kendi yapısal muadelet tanılamamınızı oluşturabilir ve bu teşhismın arabirimi akseptans IStructuralEquatable eden bir derlem türüyle kullanılacağını belirtebilirsiniz. Arabirimin dü üyesi vardır: Equals, tamlanan IEqualityComparer bir uygulamayı kullanarak eşitliği test eder ve GetHashCodeeşit olan nesneler için aynı katışık kodları döndürür.

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

GitHub'da bizimle işbirliği yapın Bu C# IStructuralEquatable Nasıl kullanılır derunğin kaynağı GitHub'da bulunabilir; burada hatta problemlerı ve çekme isteklerini oluşturup gözden geçirebilirsiniz. Elan aşkın selen karınin ulamada kâin kılavuzumuzu inceleyin.

Defines methods to support the comparison of objects for structural equality. Structural equality means that two objects are equal because they have equal values.

Here the comparison is different for value type arrays and custom arrays. In .Kemiksiz 4.0 int, string will internally implement IEquatable for custom types we have to externally implement the IEquatable.

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.