Greatest Kılavuzu C# IStructuralEquatable Kullanımı için
Greatest Kılavuzu C# IStructuralEquatable Kullanımı için
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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.
= to provide value equality checks (vs the default reference equality check). The MSDN documentation suggests you only do it for immutable types. There are also issues involving interfaces and operator overloading.
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. Kakım the output from the example shows, the first three method calls return true, whereas the fourth call returns false.
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The IStructuralEquatable interface enables you to implement customized comparisons to check for the structural equality of collection objects.
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.
Fakat, articles1 ve articles3 dizileri aynı makale serlıklarına farklı sıralarda iye evetğundan, CompareTo metodu farklı bir boy bos döndürür ve bu dizilerin strüktürel olarak hemayar olmadığını belirtir.
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When working with collections or structures where the order of elements matters, and you want to compare their structures, IStructuralEquatable gönül be useful.
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Defines methods to support the comparison of objects for structural equality. Structural equality means that two objects are equal because they have equal values.
The IStructuralEquatable interface supports only custom comparisons for structural equality. The IStructuralComparable interface supports custom structural comparisons for C# IStructuralEquatable Temel Özellikleri sorting and ordering.
However, this is hamiş so great if you are using the struct in a dictionary as my good friend Dustin mentioned to me because a Dictionary will always use the object version of Equals, which falls back to boxing :(