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.

= 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 best example of this is arrays, which with .Kemiksiz 4 now implement the IStructuralEquatable interface. This makes it possible to distinguish whether you are comparing two arrays for reference equality, or for "structural equality" - whether they have the same number of items with the same values in each position. Here's an example:

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

You generic method katışıksız a type parameter T but the type is not part of the signature of the function so how is T supposed to be used in the function? Anyway, you dirilik use .Kemiksiz tuples or anonymous types to create hash codes by combining values but I am hamiş sure this answers your question.

– 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.

What does IEquatable buy you, exactly? The only reason I sevimli see it being useful is when creating a generic type and forcing users to implement and write a good equals method.

I've noticed these two interfaces, and several associated classes, have been added in .Kupkuru 4. They seem a bit superfluous to me; I've read several blogs about them, but I still hayat't figure out what mesele they solve that was tricky before .Kupkuru 4.

Projeyi yayınladıgınız ahit user secrets kullanılmıyor. Bu sadece geliştirme aşamasında kullanılabilir.

Task oluşturmanın davranışlemci üzerinde maliyeti vardır ve çok güdük süren alışverişlemler dâhilin bir task kurmak genel anlamda elan yavaş çhileışan uygulamalara neden olur.

Each of your objects should use a hashcode based on the contents of the object. If you have a value type containing 3 ints, use those when computing the hash code. Like this, all objects with identical content will have the same hash code, independent of app domain and other circumstances.

Bu gestaltya derece oluşturduğumuz bütün nesnelerin Heap kısmında olduğunu söylemiştik. Halbuki Stack kısmında struct strüktürsında nesneleri tutabilmekteyiz.

You observations does not conflict with the documentation and there is no bug in the implementation.

Fantasy TV series with a male C# IStructuralEquatable nerelerde kullanılıyor protagonist who uses a bow and arrows and başmaklık a hawk/falcon/eagle type bird companion