Için basit anahtar C# IStructuralEquatable Kullanımı örtüsünü

Için basit anahtar C# IStructuralEquatable Kullanımı örtüsünü

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comparer IEqualityComparer An object that determines whether the current instance and other are equal.

Bu sayede, data binalarının muhtevaindeki verilerin sıralanması yahut karşıtlaştırılması çalışmalemleri özelleştirilebilir ve denetleme edilebilir hale gelir.

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

Do hamiş 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:

Although I think the gains from not boxing will be less than the cost for having CanEqual. In that case you should seal your types and you no longer need CanEqual. Sealing also başmaklık some performance benefits.

I never put much thought into using a struct over a class or even additional optimizations because to me the struct was optimized already. When I was working on fixing a bug in our DeviceDisplay to hamiş trigger new events unless a value changed a whole new world opened up to me.

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 hamiş 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

Reading through the excellent blog post by Sergey on struct equality performance he mentions that the default implementations are pretty slow and using boxing for each member. Additionally, he mentions that a memory comparison may not give you C# IStructuralEquatable Nasıl kullanılır the correct results in this super simple example:

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.

Ancak, fruits1 ve fruits3 dizileri aynı elemanlara farklı sıralarda ehil evetğundan, CompareTo metodu farklı bir haysiyet döndürür ve bu dizilerin yapısal olarak tay olmadığını belirtir.

Bu yapıya kadar oluşturduğumuz tüm nesnelerin Heap kısmında bulunduğunu söylemiştik. Halbuki Stack kısmında struct örgüsında nesneleri tutabilmekteyiz.

The IStructuralEquatable interface supports only custom comparisons for structural equality. The IStructuralComparable interface supports custom structural comparisons for sorting and ordering.

3 feature called Tuple Equality! That is right, you birey create a ValueTuple and simply compare them bey they are super optimized, don't create any objects, and reduce this to a single line of code!