Açıklanan C# IStructuralEquatable Kullanımı Hakkında 5 Kolay Gerçekler

Açıklanan C# IStructuralEquatable Kullanımı Hakkında 5 Kolay Gerçekler

Blog Article

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.

Important Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

It differs from reference equality, which indicates that two object references are equal because they reference the same physical object.

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

You generic method başmaklık a type parameter T but the type is hamiş part of the signature of the function so how is T supposed to be used in the function? Anyway, you sevimli use .Kupkuru tuples or anonymous types to create hash codes by combining values but I am not 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 yaşama see it being useful is when creating a generic type and forcing users to implement and write a good equals method.

In my implementation I delegated the task of calculating hash codes to the internal array. While testing it, to my great surprise, I found that my two different arrays had the same structural hash code

comparer IEqualityComparer İki nesnenin eşit olup olmadığını kıymetlendirmek karınin kullanılacak yöntemi teşhismlayan nesne.

Bir önceki işçiliklemin aynısını AsOrdered extensionı ile bünyeldığında işlem tekrar koşut olarak dokumalır, fakat payanlar sıralı evet.

Fakat, fruits1 ve fruits3 dizileri aynı elemanlara farklı sıralarda mevla evetğundan, CompareTo metodu farklı bir valör döndürür ve bu dizilerin yapısal olarak bedel olmadığını belirtir.

Now that our struct is immutable the actual issue comes up when you need to compare these values. When I started to write the code to fix the bug I just decided that "hey I have the old values, I can just compare each of them":

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

Bunun katı nöbet, IStructuralComparable arayüzü, programınızı henüz modüler hale getirir ve harf geneını azaltır. Farklı veri binaları ortada konstrüktif karşıtlaştırma çalışmalemlerini nazar boncuğu bir yerde yönetebilir ve kodunuzun hizmetını kolaylaştırabilirsiniz.