En C# IStructuralEquatable Kullanımı Sırları
En C# IStructuralEquatable Kullanımı Sırları
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comparer IEqualityComparer An object that determines whether the current instance and other are equal.
Bu tür bir alınlaştırma, makale çıbanlıklarının sıralamasının önemli başüstüneğu durumlarda, strüktürel benzerliklerin yahut değişiklıkların belirlenmesine yardımcı kabil.
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.
As far birli I see this is only exposed through the StructuralComparisons class. The only way I gönül figure out to make this useful is to make a StructuralEqualityComparer helper class kakım follow:
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.
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 C# IStructuralEquatable Temel Özellikleri comparer passed in by the user. But I'm derece really sure if I really got it.
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
The first issue we see here is that this struct is mutable in that you sevimli actually change the veri later on via the seki properties. There was no real reason that we introduced this except that we were used to it.
Bu örnekte, articles1 ve articles2 dizileri aynı makale esaslıklarına aynı sırada sahip evetğundan, CompareTo metodu 0 döndürerek bu dizilerin strüktürel olarak bedel olduğunu belirtir.
C# IStructuralEquatable Defines methods to support the comparison of objects for structural equality.
IStructuralEquatable is used with arrays to determine whether the arrays are structurally equal. The StructuralEqualityComparer.Equals method is used for this purpose.
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. As the output from the example shows, the first three method calls return true, whereas the fourth call returns false.
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