5 Basit Teknikleri için C# IStructuralEquatable Kullanımı
5 Basit Teknikleri için C# IStructuralEquatable Kullanımı
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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.
= to provide value equality checks (vs the default reference equality check). The MSDN documentation suggests you only do it for immutable types. There are also issues involving interfaces and operator overloading.
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.
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. Kakım the output from the example shows, the first three method calls return true, whereas the fourth call returns false.
Kakım an example, it might make sense for two different instances of an Employee class to be considered equal if they both represent the same entity in your system.
The IStructuralEquatable interface enables you to implement customized comparisons to check for the structural equality of collection objects.
Is Légal’s reported “psychological trick” considered fair play or unacceptable conduct under FIDE rules?
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comparer IEqualityComparer İki nesnenin yeksan olup olmadığını görmek derunin kullanılacak yöntemi teşhismlayan nesne.
In addition to this awesome blog Frank and I also dicussed all of this awesome in detail on Merge Conflict on episode 111:
Net on a certain ortam, I'm compelled to issue the standard warning not to rely on the values of hashcodes or how they are computed, since it is hamiş guaranteed to be the same across updates or platforms.
The contract of C# IStructuralEquatable Kullanımı Equals differs from that of IStructuralEquatable, in that it indicates whether 2 objects are logically equal.
There is no need for an equality operator that accepts different types. That should derece even compile. So this is a very weak excuse for having a non-generic interface that works with objects.
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.