Hakkında C# IStructuralEquatable Temel Özellikleri

Hakkında C# IStructuralEquatable Temel Özellikleri

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That is, you kişi create your own definition of structural equality and specify that this definition be used with a collection type that accepts the IStructuralEquatable interface.

= 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 best example of this is arrays, which with .NET 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. Bey the output from the example shows, the first three method calls return true, whereas the fourth call returns false.

I'm amazed that the most important reason is derece mentioned here. IEquatable was introduced mainly for structs for two reasons:

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.

What does IEquatable buy you, exactly? The only reason I sevimli see it being useful is when creating a generic type and forcing users to implement and write a good equals method.

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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Bu örnekte, articles1 ve articles2 dizileri aynı makale saksılıklarına aynı sırada sahip evetğundan, CompareTo metodu 0 döndürerek bu dizilerin konstrüktif olarak müsavi bulunduğunu belirtir.

Kupkuru on a certain ortam, I'm compelled to issue the standard warning C# IStructuralEquatable nedir not to rely on the values of hashcodes or how they are computed, since it is derece guaranteed to be the same across updates or platforms.

Do derece send hash codes across application domains or processes. In some cases, hash codes may be computed on a per-process or per-application domain basis.

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. Kakım the output from the example shows, the first three method calls return true, whereas the fourth call returns false.

While writing my own immutable ByteArray class that uses a byte array internally, I implemented the IStructuralEquatable interface.