Için basit anahtar C# IStructuralEquatable nedir örtüsünü

Için basit anahtar C# IStructuralEquatable nedir örtüsünü

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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?

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

. The best example of this is arrays, which with .Safi 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:

Kakım far kakım I see this is only exposed through the StructuralComparisons class. The only way I birey figure out to make this useful is to make a StructuralEqualityComparer helper class bey follow:

Ee güfte gelimi struct strüktürsında da new operatörünü kullanırsak eğer olur ilgili gestaltdan bir nesne üretilecektir ama struct bir şayan tipli değişici konstrüksiyonsında başüstüneğundan dolayı o nesne belleğin Stack kısmında koruma edilecektir.

Structural equality means that two objects are equal because they have equal values. It differs from reference equality, which indicates that two object references are equal because they reference the same physical object. The IStructuralEquatable interface enables you to implement customized comparisons to check for the structural equality of collection objects.

The IEquatable implementation C# IStructuralEquatable nedir 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:

I've noticed these two interfaces, and several associated classes, have been added in .Kemiksiz 4. They seem a bit superfluous to me; I've read several blogs about them, but I still hayat't figure out what mesele they solve that was tricky before .Kupkuru 4.

Diğer bir ifadeyle, kendi yapısal denklik tanımınızı oluşturabilir ve bu tanımın arabirimi ikrar IStructuralEquatable eden bir derlem türüyle kullanılacağını belirtebilirsiniz. Arabirimin iki üyesi vardır: Equals, belirtilen IEqualityComparer bir uygulamayı kullanarak eşitliği test fiyat ve GetHashCodeeşit olan nesneler bağırsakin aynı karma kodları döndürür.

In addition to this awesome blog Frank and I also dicussed all of this awesome in detail on Merge Conflict on episode 111:

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

Defines methods to support the comparison of objects for structural equality. Structural equality means that two objects are equal because they have equal values.

Are the bonuses for infernal war machine weapon stations static, or are they affected by their user?

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