C# IStructuralEquatable Kullanımı - Genel Bakış

C# IStructuralEquatable Kullanımı - Genel Bakış

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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.

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 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.

Daniel A.A. PelsmaekerDaniel A.A. Pelsmaeker 49.2k2121 gold badges112112 silver badges160160 bronze badges 5 In addition to answers which point to duplicate hashcodes as is documented behavior, some reasoning and reflection would also lead you to the same conclusion.

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 as well. The next logical step would be to just use .Equals on the entire metrics.

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1 My understanding is that it's used for collection like types, and encapsulates the structural part of the comparison, but leaved the comparison of the elements to a comparer passed in by the user. But I'm hamiş really sure if I really got it.

Fakat, articles1 ve articles3 dizileri aynı makale mebdelıklarına farklı sıralarda sahip evetğundan, CompareTo metodu farklı bir değer döndürür ve bu dizilerin konstrüktif olarak eşit olmadığını belirtir.

Reading through the excellent blog post by Sergey on struct equality performance he mentions that the default implementations are pretty slow and using boxing for each member. Additionally, he C# IStructuralEquatable nedir mentions that a memory comparison may hamiş give you the correct results in this super simple example:

Bu örnekte, articles1 ve articles2 dizileri aynı makale esaslıklarına aynı sırada ehil olduğundan, CompareTo metodu 0 döndürerek bu dizilerin yapısal olarak denktaş olduğunu belirtir.

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

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