C# IStructuralEquatable nerelerde kullanılıyor Için Adım Haritaya göre Yeni Adım

C# IStructuralEquatable nerelerde kullanılıyor Için Adım Haritaya göre Yeni Adım

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However, this is an implementation detail and unless you want to rely on this in your code you cannot create a stable hash code provide an object that implements IStructuralEquatable.

In certain scenarios (such bey using the value type bey a key in a dictionary) it can murder performance in one foul swoop.

Reference types (read classes) don't benefit as much. The IEquatable implementation does let you avoid a cast from System.Object but that's a very trivial gain. I still like IEquatable to be implemented for my classes since it logically makes the intent explicit.

Daniel A.A. PelsmaekerDaniel A.A. Pelsmaeker 49.2k2121 gold badges112112 silver badges160160 bronze badges 5 In addition to answers which point to duplicate hashcodes kakım is documented behavior, some reasoning and reflection would also lead you to the same conclusion.

It is used by the third example birli an argument to the Equals(Object, IEqualityComparer) method of the IStructuralEquatable interface that tuples implement. 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.

comparer IEqualityComparer An object that determines whether the current instance and other are equal.

If those objects do derece contain equality/hashcode methods that satisfy that contract, you will have to wrap them C# IStructuralEquatable Kullanımı and provide correct implementations for those methods yourself in the wrapper.

When an implementer overrides the virtual Equals method in a struct, the purpose is to provide a more efficient means of performing the value equality check and optionally to base the comparison on some subset of the struct's field or properties.

(doesn't violate documentation), but it is clearly hamiş kakım good kakım it would be if 0 were replaced with i. Also there's no reason to loop if the code were just going to use a single value from the array.

Bu örnekte, articles1 ve articles2 dizileri aynı makale başlangıçlıklarına aynı tam mevla olduğundan, CompareTo metodu 0 döndürerek bu dizilerin yapısal olarak yeksan olduğunu belirtir.

C# IStructuralEquatable Defines methods to support the comparison of objects for structural equality.

The example on MSDN gives part of the answer here; it seems to be useful for heterogeneous equality, rather than homogeneous equality - i.e. for testing whether two objects (/values) of potentially different types

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