Için basit anahtar C# IStructuralEquatable nedir örtüsünü

Için basit anahtar C# IStructuralEquatable nedir örtüsünü

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

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This is really amazing code and works great for .NET Standard libraries. If you are in a .Safi Core 2.1 application there is an even cooler way of doing this:

Bey far birli I see this is only exposed through the StructuralComparisons class. The only way I gönül figure out to make this useful is to make a StructuralEqualityComparer helper class kakım follow:

Let us hamiş forget about additional operators and not just relying on Equals. We can implement the == and != operators easily:

45IStructuralEquatable seObj = x kakım IStructuralEquatable; 64IStructuralEquatable seObj = obj birli IStructuralEquatable;

After some more testing I found that any two arrays with the same first element have the same hash. I still think this is strange behavior.

Ancak, articles1 ve articles3 dizileri aynı makale başlıklarına farklı sıralarda mevla başüstüneğundan, CompareTo metodu farklı bir fehamet döndürür ve C# IStructuralEquatable Kullanımı bu dizilerin yapısal olarak yeksan olmadığını belirtir.

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Bir önceki alışverişlemin aynısını AsOrdered extensionı ile kuruluşldığında iş yeniden paralel olarak yapılır, ancak özlar sıralı evet.

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Defines methods to support the comparison of objects for structural equality. Structural equality means that two objects are equal because they have equal values.

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.

The Equals method supports custom structural comparison of array and tuple objects. This method in turn calls the comparer object's IEqualityComparer.Equals method to compare individual array elements or tuple components, starting with the first element or component.