Definitive Guide C# IStructuralEquatable Temel Özellikleri için

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That is, you emanet create your own definition of structural equality and specify that this definition be used with a collection type that accepts the IStructuralEquatable interface.

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g. MyType and Object) which will still use the identity comparison. I suspect it's derece a great idea to do this unless it's going to be a very heavily used type in your code, where everyone will become very familiar with it and

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

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

comparer IEqualityComparer An object that determines whether the current instance and other are equal.

What does IEquatable buy you, exactly? The only reason I güç see it being useful is when creating a generic type and forcing users to implement and write a good equals method.

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.

The reason why you need the IStructuralEquatable is for defining a new way of comparision that would be right for all the objects .

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Here the comparison is different for value type arrays and custom arrays. In .Kupkuru 4.0 int, string will internally implement IEquatable for custom types we have to externally implement the IEquatable.

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