The last statement basically means that in case we rely on Equals(..) method we could calculate hash based only on the last name and the result will still be the same:
Sert çok programlama dili ile teknolojisine geniş perspektiften yaklaşarak, yeni temellayanlardan profesyonellere kadar her seviyeden bireye iyi deruneriklerle donatılmıştır.
The CompareTo method would be the default way of ordering your User class, perhaps comparing by Name. If you then decided that you wanted to sort a list of User objects by another property, say Age, you could write a class that implemented IComparer instead of altering CompareTo inside User. This would perform the custom sorting, for example:
Because you need an instance and hamiş just a method call you güç't let the generic type be inferred by the compiler (see this discussion) but have to do so when creating the instance:
Bu iş nihayetinde ulamak istediğinizi elektronik beyinınızdaki konumundan seçerek Aç butonuna tıklayın.
独自の型をコレクションの要素として利用する際には、次のことを考慮して設計しましょう
The following example creates a dictionary collection of objects of type Box with an equality comparer. Two boxes are considered equal if their dimensions are the same. It then adds the boxes to the collection.
While MSDN is a valuable resource, don't take everything MSDN says birli gospel. MSDN contains plenty of bad advice, outdated, badly written or C# IEqualityComparer Nasıl Kullanılır plain wrong content.
So what happens when it comes time to actually deduce the type argument? We have two candidates: Position and BaseClass. Both satisfy the stated bounds. Position satisfies the first bound because it is identical to the first bound, and satisfies C# IEqualityComparer Temel Özellikleri ve Kullanımı the second bound because it is smaller than the second bound.
This interface, also added in 2.0, allows you to pass custom object equality checking to a Hashtable, Dictionary and NameValueCollection. You pass in C# IEqualityComparer nedir your custom comparison implementation much like you do with IComparer and the Hashtable will use this for equality checks.
I hayat also make an IEqualityComparer for a "parent class" and use on classes that inherit. I yaşama have comparer that will behave in a different way, I güç make one to compare Value instead of Key.
The Equals(T, T) method is reflexive, symmetric, and transitive. That is, it returns true if used to compare an object with itself; true for two objects x and y if it is true for y and x; and true for two objects x and z if it is true for x and y and also true for y and z.
The calls to ReferenceEquals and C# IEqualityComparer Temel Özellikleri ve Kullanımı Equals should be prefixed by Object. and base. respectively, so that we know without looking at the rest of the class that those are the methods from Object, not a helper method in the class
Her dü öğretici bile kullanıcıların C# dilinin temellerini kavramalarını C# IEqualityComparer Kullanımı çıkarmak üzere detaylı ve etap etap örneklerle zenginleştirilmiştir.