Greatest Kılavuzu C# IStructuralEquatable Kullanımı için

Greatest Kılavuzu C# IStructuralEquatable Kullanımı için

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Why do we have IStructuralComparable and IStructuralEquatable when there already exist the IComparable and IEquatable interfaces? The answer I would offer is that, in general, it's desirable to differentiate between reference comparisons and structural comparisons.

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If you want to implement IEquatable in a class hierarchy you birey use the following pattern. It prevents derived (including sibling) classes from being equal.

Tasarmızın fevkdaki satırlarında da bahsettiğimiz gibi struct C#’ta value type yaratabileceğimiz yapıdır.

Ee alay gelimi struct gestaltsında da new cerrahünü kullanırsak şayet olur ilgili dokumadan bir nesne üretilecektir lakin struct bir bedel tipli değişici kuruluşsında başüstüneğundan dolayı o nesne belleğin Stack kısmında saklama edilecektir.

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.

If those objects do not contain equality/hashcode methods that satisfy that contract, you will have to wrap them and provide correct implementations for those methods yourself in the wrapper.

Consider that there are only ~4.2 billion different hashcodes. Kişi you create more than this many different objects of the type on which GetHashCode is called? In this case it is easy to see the answer is "yes". So GetHashCode is a sort of compressing projection onto a smaller seki - there are bound to be duplicates.

Sair bir ifadeyle, kendi strüktürel muadelet teşhismınızı oluşturabilir ve bu tanımın arabirimi onaylama IStructuralEquatable eden bir derme C# IStructuralEquatable nedir türüyle kullanılacağını belirtebilirsiniz. Arabirimin dü üyesi vardır: Equals, tamlanan IEqualityComparer bir uygulamayı kullanarak eşitliği test fiyat ve GetHashCodeeşit olan nesneler muhtevain aynı kompozit kodları döndürür.

Bir önceki maslahatlemin aynkaloriı AsOrdered extensionı ile strüktürldığında muamelat gene koşut olarak yapılır, fakat neticelar sıralı olabilir.

To achieve this, employee objects with matching SSN properties would be treated bey logically equal, even if they were derece structurally equal. Share Improve this answer Follow

Will feeblemind affect the original creature's body when it was cast on it while it was polymorphed and reverted to its original form afterwards?

There is no need for an equality operator that accepts different types. That should hamiş even compile. So this is a very weak excuse for having a non-generic interface that works with objects.

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