En C# IStructuralEquatable Kullanımı Sırları
En C# IStructuralEquatable Kullanımı Sırları
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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 not forget about additional operators and derece just relying on Equals. We emanet implement the == and != operators easily:
Your concern is that Object.GetHashCode() does derece provide values that are stable and the concern is very valid kakım hayat be seen in the first box headed by Caution in the documentation:
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Ancak, articles1 ve articles3 dizileri aynı makale mebdelıklarına farklı sıralarda sahip başüstüneğundan, CompareTo metodu farklı bir bedel döndürür ve bu dizilerin strüktürel olarak hemayar olmadığını belirtir.
The reason why you need the IStructuralEquatable is for defining a new way of comparision that would be right for all the objects .
In Xamarin.Essentials we use the C# struct all over the place to encapsulate "small groups of related variables" for our event handlers. They are groups of data that don't need to be created by the developers consuming the data and are only really used for reading the veri.
C# IStructuralEquatable Defines methods to support the comparison of objects for structural equality.
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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. Bey the output from the example shows, the first three method calls return true, whereas the fourth call returns false.
Burada uyanıklık ederseniz eğer ms.x ve ms.y bileğişlemmeyeceğinden dolayı bir Deep Copy söylenti konusudur. Eğer referans tipli dokumalar olsalardı aşağıdaki kabilinden bir sonuç C# IStructuralEquatable Temel Özellikleri elde edilecekti ve Shallow Copy lafız konusu olacaktı.