5 Basit Teknikleri için C# IStructuralEquatable nerelerde kullanılıyor

5 Basit Teknikleri için C# IStructuralEquatable nerelerde kullanılıyor

Blog Article

It's normally expected that if you implement IEquatable.Equals you will also override Object.Equals to be consistent. In this case how would you support both reference and structural equality?

1 How do such comparators relate to things like Dictionary and other collections? I know that Dictionary seems to handle structures sensibly albeit slowly in .

. The best example of this is arrays, which with .NET 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:

IStructuralComparable arayüzü, umumiyetle Array ve Tuple üzere bilgi dokumaları tarafından uygulanır. Bu muta bünyeları, elemanlarının sıralamasını ve yapkaloriı dikkate alarak katlaştırma yapar.

This code technically works, but is sort of a hot mess and is hamiş really maintainable. Anyone using the library would have to write this code as well. The next logical step would be to just use .Equals on the entire metrics.

If two objects compare as equal, the GetHashCode method for each object must return the same value. However, if two objects do not compare birli equal, the GetHashCode methods for the two object do derece have to return different values.

The IStructuralEquatable interface enables you to implement customized comparisons to check for the structural equality of collection objects. This is also made clear by the fact that this interface resides in the System.Collections namespace.

Coming soon: Throughout 2024 we will be phasing out GitHub Issues birli the feedback mechanism for content and replacing it with a new feedback system. For more information see: .

Ray BooysenRay Booysen 29.6k1414 gold badges8686 silver badges111111 bronze badges 6 so when C# IStructuralEquatable Nasıl kullanılır you are dealing with objects, is == assumed to only mean the exact same memory address (same instance)

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

C# IStructuralEquatable Defines methods to support the comparison of objects for structural equality.

IStructuralEquatable is used with arrays to determine whether the arrays are structurally equal. The StructuralEqualityComparer.Equals method is used for this purpose.

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

Burada ilgi ederseniz eğer ms.x ve ms.y değmeslekmeyeceğinden dolayı bir Deep Copy kal konusudur. Eğer referans tipli binalar olsalardı kötüdaki üzere bir sonuç elde edilecekti ve Shallow Copy alay konusu olacaktı.