5 Basit Teknikleri için C# IStructuralEquatable nerelerde kullanılıyor

5 Basit Teknikleri için C# IStructuralEquatable nerelerde kullanılıyor

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The "No" in part 2 of the answer is actually incorrect. Note: Tried editing the answer, but apparently some think that the highest rated answer being incorrect is hamiş reason enough to approve a correction edit.

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It differs from reference equality, which indicates that two object references are equal because they reference the same physical object.

IStructuralComparable arayüzü, çoklukla Array ve Tuple üzere muta mimariları tarafından uygulanır. Bu muta gestaltları, elemanlarının sıralamasını ve yapısını dikkate alarak mukabillaştırma yapar.

Let us derece forget about additional operators and hamiş just relying on Equals. We can implement the == and != operators easily:

The generic tuple classes (Tuple, Tuple, Tuple, and so on) and the Array class provide explicit implementations of the IStructuralEquatable interface. By casting (in C#) or converting (in Visual Basic) the current instance of an array or tuple to an IStructuralEquatable interface value and providing your IEqualityComparer implementation as an argument to the Equals method, you birey define a custom equality comparison for the array or collection.

The IEquatable implementation will require one less cast for these classes and birli a result will be slightly faster than the standard object.Equals method that would be used otherwise. Birli an example see the different implementation of the two methods:

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.

Sair bir ifadeyle, kendi yapısal eşitlik tanılamamınızı oluşturabilir ve bu tanılamamın arabirimi kabul IStructuralEquatable fail bir koleksiyon türüyle kullanılacağını belirtebilirsiniz. Arabirimin iki üyesi vardır: Equals, belirtilen IEqualityComparer bir uygulamayı kullanarak eşitliği sınav değer ve GetHashCodeeşit olan nesneler derunin aynı kompozit 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:

To achieve this, employee objects with matching SSN properties would be treated C# IStructuralEquatable Kullanımı as logically equal, even if they were hamiş structurally equal. Share Improve this answer Follow

Now that our struct is immutable the actual issue comes up when you need to compare these values. When I started to write the code to fix the bug I just decided that "hey I have the old values, I kişi just compare each of them":

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.