Bir İnceleme C# IStructuralEquatable Temel Özellikleri

Bir İnceleme C# IStructuralEquatable Temel Özellikleri

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However, this is an implementation detail and unless you want to rely on this in your code you cannot create a stable hash code provide an object that implements IStructuralEquatable.

Now, when we call Equals ourselves it will directly call our new fancy Equals that takes in a ScreenMetrics, which is great.

Other types which implement structural equality/comparability include tuples and anonymous types - which both clearly benefit from the ability to perform comparison based on their structure and content. A question you didn't ask is:

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

As an example, it might make sense for two different instances of an Employee class to be considered equal if they both represent the same entity in your system.

Your concern is that Object.GetHashCode() does not provide values that are stable and the concern is very valid as emanet be seen in the first box headed by Caution in the documentation:

If those objects do not contain equality/hashcode methods that satisfy that contract, you will have to wrap them and C# IStructuralEquatable Nasıl kullanılır provide correct implementations for those methods yourself in the wrapper.

We kişi also make our own container play well with these other containers by implementing these interfaces.

(doesn't violate documentation), but it is clearly derece as good kakım it would be if 0 were replaced with i. Also there's no reason to loop if the code were just going to use a single value from the array.

Bu örnekte, articles1 ve articles2 dizileri aynı makale temellıklarına aynı sırada mevla olduğundan, CompareTo metodu 0 döndürerek bu dizilerin konstrüktif olarak yeksan olduğunu belirtir.

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

Just look at the default ValueType.Equals(object) code that gets called otherwise. It's an absolute performance killer that introduces boxing, type evaluation and finally falls back on reflection if any of the fields are reference types.

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