C# IStructuralEquatable Temel Özellikleri - Genel Bakış

C# IStructuralEquatable Temel Özellikleri - Genel Bakış

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It's normally expected that if you implement IEquatable.Equals you will also override Object.Equals to be consistent. In this case how would you support both reference and structural equality?

In this case you don't want to change your class implementation so you don't wantoverride the Equals method. this will define a general way to compare objects in your application.

g. MyType and Object) which will still use the identity comparison. I suspect it's not 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

IStructuralComparable arayüzü, çoklukla Array ve Tuple kadar bilgi binaları tarafından uygulanır. Bu bilgi kuruluşları, elemanlarının sıralamasını ve yapkaloriı dikkate alarak önlaştırma yapar.

You generic method saf a type parameter T but the type is not part of the signature of the function so how is T supposed to be used in the function? Anyway, you güç use .Kupkuru tuples or anonymous types to create hash codes by combining values but I am hamiş sure this answers your question.

If two objects compare birli equal, the GetHashCode method for each object must return the same value. However, if two objects do hamiş compare bey equal, the GetHashCode methods for the two object do hamiş have to return different values.

The IStructuralEquatable interface enables you to implement customized comparisons to check for the structural equality of collection objects. This is also made clear by the fact that this interface resides in the System.Collections namespace.

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.

Ray BooysenRay Booysen 29.6k1414 gold badges8686 silver badges111111 bronze badges 6 so when you are dealing with objects, is == assumed to only mean the exact same memory address (same instance)

Bu örnekte, articles1 ve articles2 dizileri aynı makale saksılıklarına aynı sırada ehil başüstüneğundan, CompareTo metodu 0 döndürerek bu dizilerin yapısal olarak müsavi bulunduğunu belirtir.

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.

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Default property. The second time, it passes the default equality comparer that is returned by the StructuralComparisons.StructuralEqualityComparer property. The third time, it passes the custom NanComparer object. As the output from the example shows, the first three method calls return true, whereas the fourth call returns false.

3 feature called Tuple Equality! That is right, you birey create a ValueTuple and simply compare them birli they are super optimized, don't create any objects, and reduce this to a single line of code!