C# IEnumerable Kullanımı - Genel Bakış

C# IEnumerable Kullanımı - Genel Bakış

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IEnumerable tüm verileri alıp memory de sara, sorgulama hizmetlemlerini memory üzerinden yaparken IQueryable ise şartlara bağlamlı query oluşturarak doğrudan veritabanı üzerinden sorgulama maslahatlemi yapar.

If you düşünce to build a public API, it's better to use IEnumerable than List, because you better use the most minimalistic interface/class. List lets you access objects by index if that's required.

. If you need the results to be evaluated at once (say, you're mutating the structures you're querying later on, or if you don't want the iteration over the IEnumerable to take a long time) use a list.

A. We iterate the list in different way, foreach emanet be used for IEnumerable and while loop for IEnumerator.

C# IEnumerable, IEnumerator Boşluk yüzleri ve Kullanımı tasarsında bahsettiğimiz kabilinden bir klasımızın iterator özelliği kazanabilmesi midein IEnumerable yahut IEnumerable interfacelerini implemente etmesi gerekmektedir.

Oluşturduğunuz derslikı, derlem oluştururken veya hakkındalaştırma mucip öbür senaryolarda kullanabilirsiniz.

While it might seem that only array types dirilik make use of this construct, the truth of the matter is

Is "parse out" actually a phrasal verb, and in what context do you use "parse" more hot questions

but this violates the IEnumerable semantics and the time came when I got wrong results. so switched to orderly creating a fresh iterator instance (see my answer)

There are many cases (such as an infinite list or a very large list) where IEnumerable cannot be transformed to a List. The most obvious examples are all the prime numbers, all the users of facebook C# IEnumerable Nerelerde Kullanılıyor with their details, or all the items on ebay. The difference is that "List" objects are stored "right here and right now", whereas "IEnumerable" objects work "just one at a time".

This takes an IEnumerator factory function, which usually dirilik be provided very easily instead of C# IEnumerable Nerelerde Kullanılıyor the single IEnumerator instance (which yields wrong results after first iteration and breaks the semantics of IEnumerable). This avoids the issues marked C# IEnumerable Nedir by Marc Gravell and establishes full IEnumerable behavior.

Generally, don't worry about what's actually in the IEnumerables, bey it will be completely different from your actual code. Only worry about the C# IEnumerable Nedir actual output when you iterate over it :)

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The most important thing to realize is that, using Linq, the query does derece C# IEnumerable Nasıl Kullanılır get evaluated immediately. It is only run as part of iterating through the resulting IEnumerable in a foreach - that's what all the weird delegates are doing.