C# IStructuralEquatable nedir Ile ilgili detaylı notlar

C# IStructuralEquatable nedir Ile ilgili detaylı notlar

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

Now, when we call Equals ourselves it will directly call our new fancy Equals that takes in a ScreenMetrics, which is great.

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:

The generic tuple classes (Tuple, Tuple, Tuple, and so on) and the Array class provide explicit implementations of the IStructuralEquatable interface. By casting (in C#) or converting (in Visual Basic) the current instance of an array or tuple to an IStructuralEquatable interface value and providing your IEqualityComparer implementation birli an argument to the Equals method, you can define a custom equality comparison for the array or collection.

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.

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...

Projeyi yayınladıgınız zaman user secrets kullanılmıyor. Bu sadece ihya aşamasında kullanılabilir.

Bir önceki maslahatlemin aynısını AsOrdered extensionı ile konstrüksiyonldığında iş yine muvazi olarak örgülır, ancak meallar sıralı olabilir.

Ancak, fruits1 ve fruits3 dizileri aynı elemanlara farklı sıralarda ehil olduğundan, CompareTo metodu farklı bir değer döndürür ve bu dizilerin konstrüktif olarak tay 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 birey just compare each of them":

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

Specifically, I do derece know the exact type of the object. The only assumption I make is that it inherit from IStructuralEquatable.