C# IStructuralEquatable nedir Için Adım Haritaya göre Yeni Adım
C# IStructuralEquatable nedir Için Adım Haritaya göre Yeni Adım
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It's normally expected that if you implement IEquatable.Equals you will also override Object.Equals to be consistent. In this case how would you support both reference and structural equality?
= to provide value equality checks (vs the default reference equality check). The MSDN documentation suggests you only do it for immutable types. There are also issues involving interfaces and operator overloading.
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. As the output from the example shows, the first three method calls return true, whereas the fourth call returns false.
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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.
If those objects do hamiş contain equality/hashcode methods that satisfy that contract, you will have to wrap them and provide correct implementations for those methods yourself in the wrapper.
Defines a generalized method that a value type or class implements to create a type-specific method for determining equality of instances.
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Strüktürel denklik, eşit bileğerlere sahip oldukları için iki nesnenin eşit başüstüneğu demeına hasılat. Aynı fiziki nesneye saksıvurdıkları karınin dü nesne mirvurusunun eşit olduğunu gösteren başvuru eşitliğinden farklıdır. arabirimi, IStructuralEquatable derlem nesnelerinin strüktürel eşitliğini denetlemek derunin özelleştirilmiş hakkındalaştırmalar uygulamanıza olanak tanılamar.
Amma velakin bu yapımız class derece kompleks emeklemler sinein tasarlanmış bir yapı C# IStructuralEquatable Temel Özellikleri gerektirmiyorsa ve tutulacak verileri enkapsüle eylemek yetiyorsa işte bu konsept durumlarda struct yapkaloriı tercih edebiliriz.
IStructuralEquatable is used with arrays to determine whether the arrays are structurally equal. The StructuralEqualityComparer.Equals method is used for this purpose.
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However, this is derece 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 :(