Detaylar, Kurgu ve C# IEnumerable Nerelerde Kullanılıyor

Detaylar, Kurgu ve C# IEnumerable Nerelerde Kullanılıyor

Blog Article

ArrayList: ArrayList sınıfı, kararsız boyutlu ve nesnelerin bir koleksiyonunu saklamak yürekin kullanılır ve IEnumerator ile elemanlarına muvasala sağlanabilir.

, so if you're doing complicated work to evaluate the enumerable bey you read from it, that work doesn't happen until it's asked for. This is extra beneficial, because often (say, for searches again) you'll find you might not need to do the work at all.

An IEnumerable is a thing that güç be enumerated...which simply means that it has a GetEnumerator method that returns an IEnumerator.

Ya. Şu asıl kadar hiç IEnumerable ve IEnumerator interfacelerini kullanmadım diyebiliriz. Isteklendirmek gelin şimdi bu interfaceleri uslu yegâne ele alalım ve bu sırada fevkdaki satırlarda bahsettiğimiz GetEnumerator metodunuda tam teferruatlı masaya yatıralım.

System.Collections.IEnumerator. This interface provides the infrastructure to allow the caller to traverse the internal objects contained by the IEnumerable-compatible container:

They usually have a GetXXX method that returns a IEnumerable of whatever type the custom collection class uses so the internal collection güç be iterated around using a foreach loop.

Şimdi bu ifadelerin daha degaje olması için bir örnek üzerinden gidelim ve bir önceki yazgımızda custom Enumerator dershaneı ile yazdığımız Alisveris Sepeti iterator örneği yazıırlayalım:

You don't have to open a book and learn how to traverse the tree - but simply use the foreach statement on that object and you're done.)

Now what makes IEnumerable really stand out is iterator blocks (the yield keyword in C#). Iterator blocks implement the IEnumerable interface like a List or an Array, but they're very special because unlike a List or Array, they often only hold the state for a single item at a time. So if you want to loop over the lines in a very large file, for example, you gönül write an iterator block to handle the file input.

Marc GravellMarc Gravell 1.0m271271 gold badges2.6k2.6k silver badges2.9k2.9k bronze badges 1 1 The mistake with "Reset" was with just having one type C# IEnumerable Nasıl Kullanılır of enumerable. IMHO, there should have been an IMultipassEnumerable, inheriting IEnumerable, which would support Reset and guarantee that multiple passes will either return identical data or throw an exception; an ordinary IEnumerable whose collection was modified should be allowed to return 'sensible' veri if it's able to do so or throw an exception if it birey't, and an ISafeEnumerable, which would be expected to work sensibly (without throwing an exception) even if a collection changes. A bit late now to change things, though.

It is cleaner, your users don't get a C# IEnumerable Nerelerde Kullanılıyor list where they shouldn't (they could cast it to a Listafter all) and you don't need to create a Listobject.

Important Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or C# IStructuralComparable Nasıl kullanılır implied, with respect to the information provided here.

IEnumerator kullanarak, koleksiyonun hepsinı belleğe yüklemeden, sadece lüzumlu elemanları nöbetler ve bu sayede belleğin dinamik kullanılmasını esenlar.

When declaring a method’s parameter types, you should specify the weakest type possible, preferring interfaces over C# IStructuralComparable nedir base classes. For example, if you are writing a method that C# IStructuralComparable nedir manipulates a collection of items, it would be best to declare the method’s parameter by using an interface such as IEnumerable rather than using a strong data type such birli List or even a stronger interface type such as ICollection or IList: