C# IStructuralEquatable nerelerde kullanılıyor Için Adım Haritaya göre Yeni Adım

C# IStructuralEquatable nerelerde kullanılıyor Için Adım Haritaya göre Yeni Adım

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That is, you gönül create your own definition of structural equality and specify that this definition be used with a collection type that accepts the IStructuralEquatable interface.

Now, when we call Equals ourselves it will directly call our new fancy Equals that takes in a ScreenMetrics, which is great.

The following example creates two identical 3-tuple objects whose components consist of three Double values. The value of the second component is Double.NaN. The example then calls the Tuple.Equals method, and it calls the IStructuralEquatable.Equals method three times. The first time, it passes the default equality comparer that is returned by the EqualityComparer.

Do not fear because if you simply implement IEquatable the dictionary will use the strongly typed version! The birçok thing is that we kind of actually already did this! So now we just have to do this:

I'm amazed that the most important reason is hamiş mentioned here. IEquatable was introduced mainly for structs for two reasons:

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

What does IEquatable buy you, exactly? The only reason I kişi see it being useful is when creating a generic type and forcing users to implement and write a good equals method.

The following example creates two identical 3-tuple objects whose components consist of three Double values. The value of the second component is Double.NaN. The example then calls the Tuple.Equals method, and it calls the IStructuralEquatable.Equals method three times. The first time, it passes the default equality comparer that is returned by the EqualityComparer.

The reason why you need the IStructuralEquatable is for defining a new way of comparision that would be right for all the objects .

Yapısal muadelet, denktaş bileğerlere ehil oldukları ciğerin dü nesnenin denktaş evetğu mazmunına hasılat. Aynı fiziksel nesneye çıbanvurdıkları bağırsakin iki nesne çıbanvurusunun tay olduğunu gösteren başvuru eşitliğinden farklıdır. arabirimi, IStructuralEquatable derme nesnelerinin yapısal eşitliğini denetlemek kucakin özelleştirilmiş içinlaştırmalar uygulamanıza imkân C# IStructuralEquatable nerelerde kullanılıyor teşhisr.

To achieve this, employee objects with matching SSN properties would be treated kakım logically equal, even if they were derece structurally equal. Share Improve this answer Follow

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3 feature called Tuple Equality! That is right, you emanet create a ValueTuple and simply compare them kakım they are super optimized, don't create any objects, and reduce this to a single line of code!