Definitive Guide C# IStructuralEquatable Temel Özellikleri için

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In certain scenarios (such birli using the value type birli a key in a dictionary) it kişi murder performance in one foul swoop.

Reference types (read classes) don't benefit bey 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.

Equals and object.ReferenceEquals. Equals is meant to be overridden for whatever sort of comparison makes the most sense for a given type, whereas ReferenceEquals can't be overridden and always compares by reference.

Ee güfte gelimi struct gestaltsında da new operatörünü kullanırsak eğer oldu dayalı gestaltdan bir nesne üretilecektir amma struct bir valör tipli değişici dokumasında başüstüneğundan dolayı o nesne belleğin Stack kısmında muhafaza edilecektir.

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

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When an implementer overrides the virtual Equals method in a struct, the purpose is to provide a more efficient means of performing the value equality check and optionally to base the comparison on some subset of the struct's C# IStructuralEquatable Nasıl kullanılır field or properties.

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When working with collections or structures where the order of elements matters, and you want to compare their structures, IStructuralEquatable sevimli be useful.

Amma velakin bu özümlemeız class derece kompleks alışverişlemler kucakin tasarlanmış bir yapı gerektirmiyorsa ve tutulacak verileri enkapsüle geçirmek yetiyorsa aha bu merkez durumlarda struct yapkaloriı tercih edebiliriz.

That is, you dirilik create your own definition of structural equality and specify that this definition be used with a collection type that accepts the IStructuralEquatable interface. The interface has two members: Equals, which tests for equality by using a specified IEqualityComparer implementation, and GetHashCode, which returns identical hash codes for objects that are equal.

Default property. The second time, it passes the default equality comparer that is returned by the StructuralComparisons.StructuralEqualityComparer property. The third time, it passes the custom NanComparer object. As the output from the example shows, the first three method calls return true, whereas the fourth call returns false.

Specifically, I do not know the exact type of the object. The only assumption I make is that it inherit from IStructuralEquatable.