Keep in mind that for this interface to work correctly, the types within the collection or structure must also implement IStructuralEquatable or provide their own structural equality logic.
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.
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. Birli the output from the example shows, the first three method calls return true, whereas the fourth call returns false.
Let us hamiş forget about additional operators and not just relying on Equals. We can implement the == and != operators easily:
Your concern is that Object.GetHashCode() does not provide values that are stable and the concern is very valid birli güç 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.
Ancak, articles1 ve articles3 dizileri aynı makale esaslıklarına farklı sıralarda mevla başüstüneğundan, CompareTo C# IStructuralEquatable nerelerde kullanılıyor metodu farklı bir porte döndürür ve bu dizilerin konstrüktif olarak denktaş olmadığını belirtir.
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Strüktürel muadelet, hemayar değerlere malik oldukları muhtevain iki nesnenin yeksan başüstüneğu demeına hasılat. Aynı fiziksel nesneye başvurdıkları sinein iki nesne temelvurusunun denktaş bulunduğunu gösteren referans eşitliğinden değişikdır. arabirimi, IStructuralEquatable koleksiyon nesnelerinin konstrüktif eşitliğini denetlemek derunin özelleştirilmiş mukabillaştırmalar uygulamanıza imkân tanır.
To achieve this, employee objects with matching SSN properties would be treated as logically equal, even if they were hamiş structurally equal. Share Improve this answer Follow
Tamam, makalede eksiklikler olur. Bunu eleştiri olarak onaylama ediyorum. Fonksiyonel programlamada struct kullanılmasının nedenini bile bilmiyor, performans ve başka mevzular hakkında da rastgele bir düşünce çitndırmıyorum. Siz biliyorsanız lütfen aydınlatır mkaloriız?
Are the bonuses for infernal war machine weapon stations static, or are they affected by their user?
Being able to specify IStructuralEquatable/IStructuralComparable in such cases is actually useful. It would also be inconvenient to pass a TupleComparer or ArrayComparer everywhere you want to apply this type of comparison. The two approaches are hamiş mutually exclusive.