Için basit anahtar C# IStructuralEquatable nerelerde kullanılıyor örtüsünü

Için basit anahtar C# IStructuralEquatable nerelerde kullanılıyor örtüsünü

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However, this is an implementation detail and unless you want to rely on this in your code you cannot create a stable hash code provide an object that implements IStructuralEquatable.

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Reference types (read classes) don't benefit as much. The IEquatable implementation does let you avoid a cast from System.Object but that's a very trivial gain. I still like IEquatable to be implemented for my classes since it logically makes the intent explicit.

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

I'm amazed that the most important reason is not mentioned here. IEquatable was introduced mainly for structs for two reasons:

Your concern is that Object.GetHashCode() does hamiş provide values that are stable and the concern is very valid as sevimli be seen in the first box headed by Caution in the documentation:

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...

Important Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Konstrüktif denklik, eşit değerlere sahip oldukları yürekin iki nesnenin eşit başüstüneğu fehvaına hasılat. Aynı fiziksel nesneye servurdıkları yürekin dü nesne saksıvurusunun hemayar bulunduğunu gösteren başvuru eşitliğinden değişikdır. arabirimi, IStructuralEquatable koleksiyon nesnelerinin strüktürel eşitliğini denetlemek için özelleştirilmiş önlaştırmalar uygulamanıza imkân tanılamar.

To achieve this, employee objects with matching SSN properties would be treated birli logically equal, even if they were not structurally equal. Share Improve this answer Follow

He, makalede C# IStructuralEquatable Kullanımı eksiklikler mümkün. Bunu eleştiri olarak ikrar ediyorum. Fonksiyonel programlamada struct kullanılmasının nedenini bile bilmiyor, performans ve sair konular üzerine da herhangi bir rey barındırmıversiyon. Siz biliyorsanız lütfen aydınlatır mısınız?

The IStructuralEquatable interface supports only custom comparisons for structural equality. The IStructuralComparable interface supports custom structural comparisons for sorting and ordering.

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