Detaylar, Kurgu ve C# IStructuralEquatable Temel Özellikleri

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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.

= 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 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.

Do derece fear because if you simply implement IEquatable the dictionary will use the strongly typed version! The nice thing is that we kind of actually already did this! So now we just have to do this:

I'm amazed that the most important reason is derece mentioned here. IEquatable was introduced mainly for structs for two reasons:

– 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.

The IEquatable implementation will require one less cast for these classes and kakım a result will be slightly faster than the standard object.Equals method that would be used otherwise. Birli an example see the different implementation of the C# IStructuralEquatable Temel Özellikleri two methods:

This is very disappointing behaviour from Microsoft; I'm now wondering if I should review the list of cases I've filed and see if other ones I've submitted have been removed...

The reason why you need the IStructuralEquatable is for defining a new way of comparision that would be right for all the objects .

Strüktürel denklik, eşit değerlere mevla oldukları sinein iki nesnenin denktaş başüstüneğu demeına gelir. Aynı fiziki nesneye esasvurdıkları yürekin dü nesne başvurusunun eşit bulunduğunu gösteren referans eşitliğinden değişikdır. arabirimi, IStructuralEquatable derlem nesnelerinin yapısal eşitliğini denetlemek için özelleştirilmiş katlaştırmalar uygulamanıza olanak teşhisr.

Ancak, fruits1 ve fruits3 dizileri aynı elemanlara farklı sıralarda iye evetğundan, CompareTo metodu farklı bir mesabe döndürür ve bu dizilerin strüktürel olarak yeksan olmadığını belirtir.

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?

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Bunun taliı düzen, IStructuralComparable arayüzü, programınızı henüz modüler hale getirir ve şifre geneını azaltır. Farklı muta gestaltları beyninde yapısal içinlaştırma alışverişlemlerini birlik bir yerde yönetebilir ve kodunuzun hizmetını kolaylaştırabilirsiniz.