The Ultimate Guide To C# IEnumerable Nasıl Kullanılır

The Ultimate Guide To C# IEnumerable Nasıl Kullanılır

Blog Article

This isn't without cost, as it means you need either a new connection to do another DB request in parallel or a MARS connection. Too much for a comment really

What this code is saying is that if userId was specified, then add a filter on the veri so that only items where the userId matches that variable will be included. That same thing is done for email and lastFourdigits.

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

Özellikle Dictionary, HashSet kabil veri binalarıyla alay malay kullanılarak özelleştirilmiş içinlaştırmalar sağlar. Sonunda, farklı bilgi tipleri yahut katışıkşık içinlaştırma kuralları gerektiren durumlarda kullanıcıevet esneklik katkısızlar.

Normalde bilirsiniz ki bir metod takkadak çokça return yapması imkansız fakat return'ün başına yield koyduğumuzda ne oluyorda yapabiliyor?

The syntax (which you rarely see because there are prettier ways to do it) for moving through a collection that implements IEnumerable is:

The primary difference is that the C# IEnumerable Kullanımı LINQ C# IEnumerable Nerelerde Kullanılıyor operators for IQueryable take Expression objects instead of delegates, meaning the custom query logic it receives, e.g., a predicate or value selector, is in the form of an expression tree instead of a delegate to a method.

For small result sets this is likely to be a single trip, for large ones you're sending a request for more rows from the results, but it doesn't re-run the entire query.

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)

In a program, it may be better to defer converting your query to a list until the very end, so if I'm going to enumerate through Leopards and Hyenas more than once, I'd do this:

It is C# IEnumerable Nedir 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.

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

user541686user541686 208k132132 gold badges547547 silver badges911911 bronze badges 3 i also used this and was loooong happy.

…IEnumerable interface’i C# IEnumerable Temel Özellikleri ise bir sınıfa foreach mekanizması tarafından tanılamanması için lazım yetenekleri/nitelikleri kazandırır. Doğrusu enumerator yapısını… Fon : C#’ta IEnumerable ve IEnumerator Interfaceleri Nedir? ve Nasıl Kullanılır?