The "No" in part 2 of the answer is actually incorrect. Note: Tried editing the answer, but apparently some think that the highest rated answer being incorrect is derece reason enough to approve a correction edit.
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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.
Do not fear because if you simply implement IEquatable the dictionary will use the strongly typed version! The nice thing is that we kind of actually already did this! So now we just have to do this:
You generic method has a type parameter T but the type is not part of the signature of the function so how is T supposed to be used in the function? Anyway, you güç use .Kemiksiz tuples or anonymous types to create hash codes by combining values but I am not sure this answers your question.
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.
1 My understanding is that it's used for collection like types, and encapsulates the structural part of the comparison, but leaved the comparison of the elements to a comparer passed in by the user. But I'm hamiş really sure if I really got it.
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.
The first issue we see here is that this struct is mutable in that you kişi actually change the data later on via the set properties. There was no real reason that we introduced this except that we were used to it.
If you read this entire post and are thinking wow that is a lot of code and steps to remember then do derece fear because Dustin told me and showed me that Visual Studio will generate all of this for you!!!!! Check this out:
C# IStructuralEquatable Defines methods to support the comparison of objects for structural equality.
IStructuralEquatable is used with arrays to determine C# IStructuralEquatable nerelerde kullanılıyor whether the arrays are structurally equal. The StructuralEqualityComparer.Equals method is used for this purpose.
There is no need for an equality operator that accepts different types. That should not even compile. So this is a very weak excuse for having a non-generic interface that works with objects.
Bunun taçı aralık, IStructuralComparable arayüzü, programınızı elan modüler hale getirir ve kod tekrarını azaltır. Farklı muta kuruluşları beyninde yapısal zıtlaştırma teamüllemlerini biricik bir yerde yönetebilir ve kodunuzun hizmetını kolaylaştırabilirsiniz.