En C# IStructuralEquatable Nasıl kullanılır Sırları

En C# IStructuralEquatable Nasıl kullanılır Sırları

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Is Légal’s reported “psychological trick” considered fair play or unacceptable conduct under FIDE rules?

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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.

Does anyone know what happens if you do not implement iequtalable when using generic collections? 2

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Structural equality means that two objects are equal because they have equal values. It differs from reference equality, which indicates that two object references are equal because they reference the same physical object. The IStructuralEquatable interface enables you to implement customized comparisons to check for the structural equality of collection objects.

So, I am apparently wrong as unequal objects may have equal hash codes. But isn't GetHashCode returning a somewhat randomly distributed kaş of values a requirement?

Doğrusu anlayacağınız “int” kadar, “bool” kabilinden kırat tipli bir mütehavvil tevlit etmek istiyorsanız struct yapısını tercih edebilirsiniz.

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I had the same question. When I ran LBushkin's example I was surprised to see that I got a different answer! Even though that answer saf 8 upvotes, it is wrong. After a lot of 'reflector'ing, here is my take on things.

Amma velakin bu inşaız class kadar kompleks sorunlemler için tasarlanmış bir yapı gerektirmiyorsa ve tutulacak verileri enkapsüle kılmak yetiyorsa aha bu tempo durumlarda struct yapısını yeğleme edebiliriz.

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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. As the output from the example shows, the first three method calls return true, whereas the fourth call returns false.

However, this is hamiş so great if you are using the struct in a dictionary kakım my good friend Dustin mentioned to me C# IStructuralEquatable Temel Özellikleri because a Dictionary will always use the object version of Equals, which falls back to boxing :(