5 Temel Unsurları için C# IEnumerable Temel Özellikleri

5 Temel Unsurları için C# IEnumerable Temel Özellikleri

Blog Article

Implementation of IEnumerable is generally the preferred way for a class to indicate that it should be usable with a "foreach" loop, and that multiple "foreach" loops on the same object should operate independently.

What rights does an employee retain, if any, who does hamiş consent to being monitored on a work IT system?

Lütfen zirdaki kutuya şikayetinizin bilgilerinı yazın. Şikayetinizi değerlendirildikten sonrasında size bilim vereceğiz.

Analogy: Imagine you are a detective on an aeroplane . You need to work your way through all the passengers to find your suspect.

Yazılı sınavmda iterasyon dendiğinde akla ilk olarak foreach geldiğini biliyoruz. Zımnında hepimiz foreach döngüsü ile iterasyonel bir gestaltda olan tüm referanslar üzerinde kârlemler yapabilmekteyiz. Ayrıca kendi custom sınıflarımıza iterasyonel özellik kazanmıştırrabilmek ve foreach ile üzerinde muamele yapabilmemiz yürekin IEnumerable interface’ini kullanmaktayız. IEnumerable’ı hatırlama mahiyetinde referans aldığımız kaynaktan ait mimariya üstüne tuzakıntıda bulunalım;

Basically it özgü a method to get the next item in the collection. It doesn't need the whole collection to be in memory and doesn't know how many items are in it, foreach just keeps getting the next item until it runs out.

Collaborate with us on GitHub The source for this content kişi be found on GitHub, where you can also create and review issues and pull requests. For more information, see our contributor guide.

It katışıksız a good performance when you are iterating through big objects or collections because it does derece load the entire object to memory in order to make iteration.

Your linq expression returns an enumeration, and by default the expression executes when you iterate through using the foreach. An IEnumerable linq statement executes when you iterate the foreach, but you dirilik force it to iterate sooner using .ToList().

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 of enumerable. IMHO, there should have been an IMultipassEnumerable, inheriting C# IStructuralComparable Nasıl kullanılır IEnumerable, which would support Reset and guarantee that multiple passes will either return identical veri or throw an exception; an ordinary IEnumerable whose collection was modified should be allowed to return 'sensible' data if it's able to do so or throw an exception if it yaşama't, and an ISafeEnumerable, which would be expected to work sensibly (without throwing an exception) even C# IStructuralComparable Kullanımı if a collection changes. A bit late now to change things, though.

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

But if your class cannot act like a collection then provide a public C# IStructuralComparable nedir IEnumerable property for its elements:

Reed CopseyReed Copsey 561k7979 gold badges1.2k1.2k silver badges1.4k1.4k bronze badges 3 2 I agree strongly with your point about decoupling from the implementation, but I C# IStructuralComparable Temel Özellikleri also C# IStructuralComparable Nasıl kullanılır think there's a point for making clear the expected usage; even if I have a List, referring to it kakım IEnumerable makes it clear that the functionality I'm expecting from the collection in that usage is the enumerability functionality, and not any of the other List functionality.

The most important thing to realize is that, using Linq, the query does not get evaluated immediately. It is only run kakım part of iterating through the resulting IEnumerable in a foreach - that's what all the weird delegates are doing.