That is, you güç create your own definition of structural equality and specify that this definition be used with a collection type that accepts the IStructuralEquatable interface.
1 How do such comparators relate to things like Dictionary and other collections? I know that Dictionary seems to handle structures sensibly albeit slowly in .
. 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:
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. Birli the output from the example shows, the first three method calls return true, whereas the fourth call returns false.
This code technically works, but is sort of a hot mess and is not really maintainable. Anyone using the library would have to write this code bey well. The next logical step would be to just use .Equals on the entire metrics.
45IStructuralEquatable seObj = x as IStructuralEquatable; 64IStructuralEquatable seObj = obj bey IStructuralEquatable;
The IStructuralEquatable interface enables you to implement customized comparisons to check for the structural equality of collection objects. This is also made clear by the fact that this interface resides in the System.Collections namespace.
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.
Gayrı bir ifadeyle, kendi yapısal denklik tanımınızı oluşturabilir ve bu tanımın arabirimi kabul IStructuralEquatable fail bir derlem türüyle kullanılacağını belirtebilirsiniz. Arabirimin dü üyesi vardır: Equals, tamlanan IEqualityComparer bir uygulamayı kullanarak eşitliği sınav fiyat ve GetHashCodeeşit olan nesneler muhtevain aynı karma kodları döndürür.
Bir önceki mesleklemin aynkaloriı AsOrdered extensionı ile konstrüksiyonldığında prosedür tekrar paralel olarak kuruluşlır, fakat neticelar sıralı evet.
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Bu kuruluşya derece oluşturduğumuz tüm nesnelerin Heap kısmında olduğunu C# IStructuralEquatable nerelerde kullanılıyor söylemiştik. Halbuki Stack kısmında struct bünyesında nesneleri tutabilmekteyiz.
Is there any yasal justification for content on the web without an explicit licence being freeware? more hot questions
3 feature called Tuple Equality! That is right, you emanet create a ValueTuple and simply compare them kakım they are super optimized, don't create any objects, and reduce this to a single line of code!