Hakkında herşey C# IStructuralEquatable Nasıl kullanılır

Hakkında herşey C# IStructuralEquatable Nasıl kullanılır

Blog Article

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

= to provide value equality checks (vs the default reference equality check). The MSDN documentation suggests you only do it for immutable types. There are also issues involving interfaces and operator overloading.

That is right! When we override Equals we must also override and implement GetHashCode. I am no HashCode expert, but in the same article from Sergey is a snippet of using a ValueTuple to simplify this entire call to 1 line of code just like our fancy ValueTuple Equality above.

Does anyone know what happens if you do hamiş implement iequtalable when using generic collections? 2

You generic method başmaklık 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 birey use .Safi tuples or anonymous types to create hash codes by combining values but I am derece sure this answers your question.

The following example defines a NanComparer class that implements the IStructuralEquatable interface. It compares two Double or two Single values by using the equality operator. It passes values of any other type to the default equality comparer.

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.

Defines a generalized method that a value type or class implements to create a type-specific method for determining equality of instances.

(doesn't violate documentation), but it is clearly hamiş as good birli 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.

Bir önceki meselelemin aynkaloriı AsOrdered extensionı ile konstrüksiyonldığında muamele tekrar muvazi olarak örgülır, fakat akıbetlar sıralı olur.

Amma velakin bu inşaız class kadar kompleks kârlemler muhtevain tasarlanmış bir C# IStructuralEquatable nerelerde kullanılıyor yapı gerektirmiyorsa ve tutulacak verileri enkapsüle eylemek yetiyorsa aha bu biçim durumlarda struct yapkaloriı tercih edebiliriz.

Do hamiş send hash codes across application domains or processes. In some cases, hash codes may be computed on a per-process or per-application domain basis.

You observations does derece conflict with the documentation and there is no bug in the implementation.

Being able to specify IStructuralEquatable/IStructuralComparable in such cases is actually useful. It would also be inconvenient to pass a TupleComparer or ArrayComparer everywhere you want to apply this type of comparison. The two approaches are not mutually exclusive.