Hakkında herşey C# IStructuralEquatable Temel Özellikleri
Hakkında herşey C# IStructuralEquatable Temel Özellikleri
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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.
If you want to implement IEquatable in a class hierarchy you kişi use the following pattern. It prevents derived (including sibling) classes from being equal.
Does anyone know what happens if you do hamiş 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.
If two objects compare as equal, the GetHashCode method for each object must return the same value. However, if two objects do derece compare kakım equal, the GetHashCode methods for the two object do not have to return different values.
The IStructuralEquatable interface enables you to implement customized comparisons to check for the structural equality of collection objects. This is also made clear by the fact that this interface resides in the System.Collections namespace.
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.
Ray BooysenRay Booysen 29.6k1414 gold badges8686 silver badges111111 bronze badges 6 so when you are dealing with objects, is == assumed to only mean the C# IStructuralEquatable Kullanımı exact same memory address (same instance)
Bu örnekte, articles1 ve articles2 dizileri aynı makale çıbanlıklarına aynı sırada mevla evetğundan, CompareTo metodu 0 döndürerek bu dizilerin strüktürel olarak yeksan bulunduğunu belirtir.
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