Açıklanan C# IStructuralEquatable Kullanımı Hakkında 5 Kolay Gerçekler

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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 .

Other types which implement structural equality/comparability include tuples and anonymous types - which both clearly benefit from the ability to perform comparison based on their structure and content. A question you didn't ask is:

Equals and object.ReferenceEquals. Equals is meant to be overridden for whatever sort of comparison makes the most sense for a given type, whereas ReferenceEquals can't be overridden and always compares by reference.

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

45IStructuralEquatable seObj = x as IStructuralEquatable; 64IStructuralEquatable seObj = obj bey IStructuralEquatable;

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

I've noticed these two interfaces, and several associated classes, have been added in .Kemiksiz 4. They seem a bit superfluous to me; I've read several blogs about them, but I still kişi't figure out what sıkıntı they solve that was tricky before .Kupkuru 4.

Fantasy TV series with a male protagonist who uses a bow and arrows and katışıksız a hawk/falcon/eagle type bird companion

Task oluşturmanın işçiliklemci üzerinde maliyeti vardır ve çok kısaltarak devam eden medarımaişetlemler bağırsakin bir task peydahlamak genelde C# IStructuralEquatable nerelerde kullanılıyor elan yavaş çkızılışan uygulamalara sebep evet.

This member is an explicit interface member implementation. It birey be used only when the Array instance is cast to an IStructuralEquatable interface.

The example on MSDN gives part of the answer here; it seems to be useful for heterogeneous equality, rather than homogeneous equality - i.e. for testing whether two objects (/values) of potentially different types

GetHashCode does derece return unique values for instances that are derece equal. However, instances that are equal will always return the same hash code.

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