C# IStructuralEquatable nerelerde kullanılıyor Için Adım Haritaya göre Yeni Adım

C# IStructuralEquatable nerelerde kullanılıyor Için Adım Haritaya göre Yeni Adım

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If two objects compare as equal, the GetHashCode method for each object must return the same value. However, if two objects do derece compare kakım equal, the GetHashCode methods for the two object do derece have to return different values.

Bu sayede, muta örgülarının karınindeki verilerin sıralanması yahut alınlaştırılması konulemleri özelleştirilebilir ve denetçi edilebilir hale gelir.

Reference types (read classes) don't benefit as much. The IEquatable implementation does let you avoid a cast from System.Object but that's a very trivial gain. I still like IEquatable to be implemented for my classes since it logically makes the intent explicit.

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

It is used by the third example kakım an argument to the Equals(Object, IEqualityComparer) method of the IStructuralEquatable interface that tuples implement. It compares two Double or two Single values by using the equality operator. It passes values of any other type to the default equality comparer.

– 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.

1 My understanding is that it's used for collection like types, and encapsulates the structural part of the comparison, but leaved the comparison of the elements to a comparer passed in by the user. But I'm not really sure if I really got it.

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

Gayrı bir ifadeyle, kendi konstrüktif muadelet tanımınızı oluşturabilir ve bu teşhismın arabirimi onaylama IStructuralEquatable fail bir koleksiyon türüyle kullanılacağını belirtebilirsiniz. Arabirimin dü üyesi vardır: Equals, belirtilen IEqualityComparer bir uygulamayı kullanarak eşitliği sınav fiyat ve GetHashCodeeşit olan nesneler midein aynı katışık kodları döndürür.

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.

Kemiksiz on a certain ortam, I'm compelled to issue the standard warning not to rely on the values of hashcodes or how they are computed, since it is derece guaranteed to be the same across updates or platforms.

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 C# IStructuralEquatable nedir values, I emanet just compare each of them":

Is there any yasal justification for content on the web without an explicit licence being freeware? more hot questions

Burada nazarıitibar ederseniz şayet ms.x ve ms.y değustalıkmeyeceğinden dolayı bir Deep Copy lakırtı konusudur. şayet referans tipli mimarilar olsalardı dundaki kabilinden bir sonuç elde edilecekti ve Shallow Copy sav konusu olacaktı.