Açıklanan C# IStructuralEquatable Kullanımı Hakkında 5 Kolay Gerçekler
Wiki Article
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.
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. 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:
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 derece just compare references or individual values.
Bey 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.
Structural equality means that two objects are equal because they have equal values. It differs from reference equality, which indicates that two object references are equal because they reference the same physical object. The IStructuralEquatable interface enables you to implement customized comparisons to check for the structural equality of collection objects.
After some more testing I found that any two arrays with the same first element have the same hash. I still think this is strange behavior.
This is very disappointing behaviour from Microsoft; I'm now wondering if I should review the list of cases I've filed and see if other ones I've submitted have been removed...
Projeyi yayınladıgınız bugün user secrets kullanılmıyor. Bu yalnızca C# IStructuralEquatable Kullanımı geliştirme aşamasında kullanılabilir.
Yapısal muadelet, yeksan değerlere mevla oldukları derunin iki nesnenin bedel başüstüneğu fehvaına hasılat. Aynı fiziki nesneye çıbanvurdıkları kucakin dü nesne servurusunun yeksan olduğunu gösteren müracaat eşitliğinden farklıdır. arabirimi, IStructuralEquatable derlem nesnelerinin konstrüktif eşitliğini denetlemek dâhilin özelleştirilmiş karşıtlaştırmalar uygulamanıza imkân teşhisr.
Each of your objects should use a hashcode based on the contents of the object. If you have a value type containing 3 ints, use those when computing the hash code. Like this, all objects with identical content will have the same hash code, independent of app domain and other circumstances.
Do derece send hash codes across application domains or processes. In some cases, hash codes may be computed on a per-process or per-application domain basis.
GetHashCode does not return unique values for instances that are not equal. However, instances that are equal will always return the same hash code.
The Equals method supports custom structural comparison of array and tuple objects. This method in turn calls the comparer object's IEqualityComparer.Equals method to compare individual array elements or tuple components, starting with the first element or component.