Definitive Guide C# IStructuralEquatable Temel Özellikleri için

Definitive Guide C# IStructuralEquatable Temel Özellikleri için

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It's normally expected that if you implement IEquatable.Equals you will also override Object.Equals to be consistent. In this case how would you support both reference and structural equality?

In this case you don't want to change your class implementation so you don't wantoverride the Equals method. this will define a general way to compare objects in your application.

g. MyType and Object) which will still use the identity comparison. I suspect it's hamiş a great idea to do this unless it's going to be a very heavily used type in your code, where everyone will become very familiar with it and

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

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The following example defines a NanComparer class that implements the IStructuralEquatable interface. 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.

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In my implementation I delegated the task of calculating hash codes to the internal array. While testing it, to my great surprise, I found that my two different arrays had the same structural hash code

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Bu örnekte, articles1 ve articles2 dizileri aynı makale başlangıçlıklarına aynı tam mevla evetğundan, CompareTo metodu 0 döndürerek bu dizilerin konstrüktif olarak bedel bulunduğunu belirtir.

Safi on a certain platform, I'm compelled to issue the standard warning not to rely on the values of hashcodes or how they are computed, since it is not guaranteed to be the same across updates or platforms.

The contract of 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 hamiş 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.