En son beş C# IStructuralEquatable Kullanımı Kentsel haber
En son beş C# IStructuralEquatable Kullanımı Kentsel haber
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That is, you gönül create your own definition of structural equality and specify that this definition be used with a collection type that accepts the IStructuralEquatable interface.
Now, when we call Equals ourselves it will directly call our new fancy Equals that takes in a ScreenMetrics, which is great.
. The best example of this is arrays, which with .Kupkuru 4 now implement the IStructuralEquatable interface. This makes it possible to distinguish whether you are comparing two arrays for reference equality, or for "structural equality" - whether they have the same number of items with the same values in each position. Here's an example:
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. Birli the output from the example shows, the first three method calls return true, whereas the fourth call returns false.
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The IStructuralEquatable interface enables you to implement customized comparisons to check for the structural equality of collection objects.
Aynı işlemi her bir iterasyon midein bir task oluşturup yapabiliyorken niye Muvazi bir döngü oluşturmalıyız?
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.
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I had the same question. When I ran LBushkin's example I was surprised to see that I C# IStructuralEquatable nedir got a different answer! Even though that answer katışıksız 8 upvotes, it is wrong. After a lot of 'reflector'ing, here is my take on things.
Amma velakin bu imalız class denli kompleks teamüllemler kucakin tasarlanmış bir yapı gerektirmiyorsa ve tutulacak verileri enkapsüle geçirmek yetiyorsa işte bu soluk durumlarda struct yapkaloriı yeğleme edebiliriz.
Tamam, makalede eksiklikler olur. Bunu eleştiri olarak onaylama ediyorum. Fonksiyonel programlamada struct kullanılmasının nedenini bile bilmiyor, performans ve sair konular karşı da rastgele bir görüş çitndırmıyorum. Siz biliyorsanız lütfen aydınlatır mkaloriız?
Fantasy TV series with a male protagonist who uses a bow and arrows and has a hawk/falcon/eagle type bird companion
However, this is derece so great if you are using the struct in a dictionary birli my good friend Dustin mentioned to me because a Dictionary will always use the object version of Equals, which falls back to boxing :(