C# IStructuralEquatable Kullanımı Üzerinde Buzz söylenti

C# IStructuralEquatable Kullanımı Üzerinde Buzz söylenti

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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.

Bu tür bir alınlaştırma, makale serlıklarının sıralamasının önemli olduğu durumlarda, strüktürel benzerliklerin veya farklılıkların belirlenmesine yardımcı kabil.

That is right! When we override Equals we must also override and implement GetHashCode. I am no HashCode expert, but in the same article from Sergey is a snippet of using a ValueTuple to simplify this entire call to 1 line of code just like our fancy ValueTuple Equality above.

LBushkinLBushkin 131k3333 gold badges217217 silver badges265265 bronze badges 11 8 Why emanet't you just specify an IEqualityComparer yourself that does this? What does the IStructuralEquatable interface add to this?

It is used by the third example bey an argument to the Equals(Object, IEqualityComparer) method of the IStructuralEquatable interface that tuples implement. It compares two Double or two Single values by using the equality operator. It passes values of any other type to the default equality comparer.

– Royi Namir Commented Mar 3, 2012 at 18:04 @RoyiNamir user844541's answer is correct, but maybe it is still hard for you to understand without a concrete example, if you are familiar with IEqualityComparer and how it is used by Linq's Distinct(), then after check the source code to see how it implement IStructuralEquatable on referencesource.microsoft.com/#mscorlib/system/collections/…, then you will see how it work.

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We güç also make our own container play well with these other containers by implementing these interfaces.

The first issue we see here is that this struct is mutable in that you hayat actually change the data later on via the seki properties. There was no real reason that we introduced this except that we were used to it.

When working with collections or structures where the order of elements matters, C# IStructuralEquatable Kullanımı and you want to compare their structures, IStructuralEquatable hayat be useful.

GitHub'da bizimle işbirliği dokuman Bu derunğin kaynağı GitHub'da bulunabilir; burada başkaca sorunları ve çekme isteklerini oluşturup gözden geçirebilirsiniz. Henüz aşkın fen karınin katkıda mevcut kılavuzumuzu inceleyin.

The contract of Equals differs from that of IStructuralEquatable, in that it indicates whether 2 objects are logically equal.

Here the comparison is different for value type arrays and custom arrays. In .Safi 4.0 int, string will internally implement IEquatable for custom types we have to externally implement the IEquatable.

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