C# IStructuralEquatable Temel Özellikleri - Genel Bakış

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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.

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This is really amazing code and works great for .Safi Standard libraries. If you are in a .Safi Core 2.1 application there is an even cooler way of doing this:

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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.

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

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 derece really sure if I really got it.

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.

Başka bir ifadeyle, kendi yapısal muadele tanılamamınızı oluşturabilir ve bu tanılamamın arabirimi ikrar IStructuralEquatable fail bir derlem türüyle kullanılacağını belirtebilirsiniz. Arabirimin dü üyesi vardır: Equals, tamlanan IEqualityComparer bir uygulamayı kullanarak eşitliği sınav değer ve GetHashCodeeşit olan nesneler yürekin aynı muhtelit kodları döndürür.

In addition to this awesome blog Frank and I also dicussed all C# IStructuralEquatable Nasıl kullanılır of this awesome in detail on Merge Conflict on episode 111:

Each of your objects should use a hashcode based on the contents of the object. If you have a value type containing 3 ints, use those when computing the hash code. Like this, all objects with identical content will have the same hash code, independent of app domain and other circumstances.

IStructuralEquatable is used with arrays to determine whether the arrays are structurally equal. The StructuralEqualityComparer.Equals method is used for this purpose.

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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