The individual calls to IEqualityComparer.Equals end and the IStructuralEquatable.Equals method returns a value either when a method call returns false or after all array elements or tuple components have been compared.
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.
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.
Birli far kakım I see this is only exposed through the StructuralComparisons class. The only way I hayat figure out to make this useful is to make a StructuralEqualityComparer helper class as follow:
Let us not forget about additional operators and hamiş just relying on Equals. We güç implement the == and != operators easily:
If two objects compare as equal, the GetHashCode method for each object must return the same value. However, if two objects do derece compare kakım equal, the GetHashCode methods for the two object do not have to return different values.
The IEquatable implementation will require one less cast for these classes and birli a result will be slightly faster than the standard object.Equals method that would be used otherwise. Kakım an example see the different implementation of the two methods:
I've noticed these two interfaces, and several associated classes, have been added in .Kemiksiz 4. They seem a bit superfluous to me; I've read several blogs about them, but I still güç't figure out what mesele they solve that was tricky before .NET 4.
The first issue we see here is that this struct is mutable in that you gönül actually change the veri later on via the set properties. There was no real reason that we introduced this except that we were used to it.
Bu örnekte, articles1 ve articles2 dizileri aynı makale mebdelıklarına aynı tam iye başüstüneğundan, CompareTo metodu 0 döndürerek bu dizilerin konstrüktif olarak hemayar olduğunu belirtir.
C# IStructuralComparable Determines whether the current collection object C# IStructuralEquatable nerelerde kullanılıyor precedes, occurs in the same position bey, or follows another object in the sort order.
Defines methods to support the comparison of objects for structural equality. Structural equality means that two objects are equal because they have equal values.
GetHashCode does derece return unique values for instances that are derece equal. However, instances that are equal will always return the same hash code.
3 feature called Tuple Equality! That is right, you can create a ValueTuple and simply compare them kakım they are super optimized, don't create any objects, and reduce this to a single line of code!