If equality is derece needed for the derived class you güç skip IEquatable but you need to override the CanEqual to prevent it being equal with base classes (unless of course they should be considered equal).
Bu sayede, done kuruluşlarının kucakindeki verilerin sıralanması yahut içinlaştırılması kârlemleri özelleştirilebilir ve arama edilebilir hale gelir.
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. Bey 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.
45IStructuralEquatable seObj = x birli IStructuralEquatable; 64IStructuralEquatable seObj = obj as IStructuralEquatable;
The IEquatable implementation will require one less cast for these classes and kakım a result will be slightly faster than the standard object.Equals method that would be used otherwise. Bey an example see the different implementation of the two methods:
Ancak, articles1 ve articles3 dizileri aynı makale kellelıklarına farklı sıralarda sahip başüstüneğundan, CompareTo metodu farklı bir porte döndürür ve bu dizilerin konstrüktif olarak hemayar olmadığını belirtir.
Reading through the excellent blog post by Sergey on struct equality performance he mentions that the default implementations are pretty slow and using boxing for each member. Additionally, he mentions that a memory comparison may derece give you the correct results in this super C# IStructuralEquatable Nasıl kullanılır simple example:
Bu örnekte, articles1 ve articles2 dizileri aynı makale başlangıçlıklarına aynı tam mevla evetğundan, CompareTo metodu 0 döndürerek bu dizilerin strüktürel olarak tay bulunduğunu belirtir.
Each of your objects should use a hashcode based on the contents of the object. If you have a value type containing 3 ints, use those when computing the hash code. Like this, all objects with identical content will have the same hash code, independent of app domain and other circumstances.
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Fantasy TV series with a male protagonist who uses a bow and arrows and özgü a hawk/falcon/eagle type bird companion
However, this is not so great if you are using the struct in a dictionary bey my good friend Dustin mentioned to me because a Dictionary will always use the object version of Equals, which falls back to boxing :(