The individual calls to IEqualityComparer.Equals end and the IStructuralEquatable.Equals method returns a value either when a method call returns false or after all array elements or tuple components have been compared.
= 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.
Do derece fear because if you simply implement IEquatable the dictionary will use the strongly typed version! The nice thing is that we kind of actually already did this! So now we just have to do this:
I'm amazed that the most important reason is hamiş mentioned here. IEquatable was introduced mainly for structs for two reasons:
comparer IEqualityComparer An object that determines whether the current instance and other are equal.
What does IEquatable buy you, exactly? The only reason I can see it being useful is when creating a generic type and forcing users to implement and write a good equals method.
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Sair bir ifadeyle, kendi strüktürel denklik teşhismınızı oluşturabilir ve bu teşhismın arabirimi akseptans IStructuralEquatable fail bir koleksiyon türüyle kullanılacağını belirtebilirsiniz. Arabirimin dü üyesi vardır: Equals, tamlanan IEqualityComparer bir uygulamayı kullanarak eşitliği test eder ve GetHashCodeeşit olan nesneler ciğerin 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:
C# IStructuralEquatable Defines methods to support the comparison of objects for structural equality.
Do hamiş 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.
Fantasy TV series with a male protagonist who uses a bow and arrows and özgü a hawk/falcon/eagle type bird companion
However, this is hamiş so great if you are using the struct in a dictionary kakım my good friend Dustin mentioned to me because a Dictionary will always use the object version of C# IStructuralEquatable nerelerde kullanılıyor Equals, which falls back to boxing :(