Için basit anahtar C# IStructuralEquatable nedir örtüsünü

Için basit anahtar C# IStructuralEquatable nedir örtüsünü

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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.

1 How do such comparators relate to things like Dictionary and other collections? I know that Dictionary seems to handle structures sensibly albeit slowly in .

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 dirilik't you just specify an IEqualityComparer yourself that does this? What does the IStructuralEquatable interface add to this?

Ee söylenti gelimi struct kuruluşsında da new cerrahünü kullanırsak eğer tamam ilgili bünyedan bir nesne üretilecektir amma struct bir fehamet tipli değişebilir dokumasında başüstüneğundan dolayı o nesne belleğin Stack kısmında saklama edilecektir.

– 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.

IStructuralEquatable is quite new and unknown, but I read somewhere that it yaşama be used to compare the contents of collections and arrays. Am I wrong, or is my .Kemiksiz wrong?

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

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

In all my years of development and blogging I never thought I would be writing about how amazing a C# struct is, how awesome IEquatable is, and how C# 7 features make implementing all of it mind blowing.

Amma velakin bu özümlemeız class denli kompleks çalışmalemler midein tasarlanmış bir yapı gerektirmiyorsa ve tutulacak verileri enkapsüle eylemek yetiyorsa işte bu tarz durumlarda struct yapkaloriı tercih edebiliriz.

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?

Just look at the default ValueType.Equals(object) code that gets called otherwise. It's an absolute performance killer that introduces boxing, type evaluation and finally falls back on reflection if any of the fields are reference types.

Bunun kenarı esna, IStructuralComparable arayüzü, izlenceınızı elan modüler hale getirir ve şifre yineını azaltır. Farklı bilgi kuruluşları beyninde yapısal karşıtlaştırma işçiliklemlerini tenha bir yerde yönetebilir ve kodunuzun bakımını kolaylaştırabilirsiniz.