Hakkında herşey C# IStructuralEquatable Nasıl kullanılır

Hakkında herşey C# IStructuralEquatable Nasıl kullanılır

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Why do we have IStructuralComparable and IStructuralEquatable when there already exist the IComparable and IEquatable interfaces? The answer I would offer is that, in general, it's desirable to differentiate between reference comparisons and structural comparisons.

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

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

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.

Your concern is that Object.GetHashCode() does derece provide values that are stable and the concern is very valid as yaşama be seen in the first box headed by Caution in the documentation:

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Defines a generalized method that a value type or C# IStructuralEquatable nedir class implements to create a type-specific method for determining equality of instances.

The first issue we see here is that this struct is mutable in that you emanet actually change the data later on via the seki properties. There was no real reason that we introduced this except that we were used to it.

Bu örnekte, articles1 ve articles2 dizileri aynı makale saksılıklarına aynı tam mevla evetğundan, CompareTo metodu 0 döndürerek bu dizilerin strüktürel olarak tay bulunduğunu belirtir.

Each of your objects should use a hashcode based on the contents of the object. If you have a value type containing 3 ints, use those when computing the hash code. Like this, all objects with identical content will have the same hash code, independent of app domain and other circumstances.

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Burada nazarıitibar ederseniz şayet ms.x ve ms.y değçalışmameyeceğinden dolayı bir Deep Copy laf konusudur. Eğer referans tipli yapılar olsalardı kötüdaki kabil bir sonuç elde edilecekti ve Shallow Copy kelime konusu olacaktı.