Detaylar, Kurgu ve C# IEnumerable Nerelerde Kullanılıyor

Detaylar, Kurgu ve C# IEnumerable Nerelerde Kullanılıyor

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So is it faster to use List over IEnumerable? Only if you want to prevent a query from being executed more than once. But is it better overall? Well in the above, Leopards and Hyenas get converted into single SQL queries each

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.

Different implementations of collections can be enumerable; using IEnumerable makes it clear that what you're interested in is the enumerability, and hamiş the structure of the underlying implementation of the collection.

Consider that in your code example a new list created. I don't know what is m_states, but if this is a value types collection, you create a clone of the original list. In this way the returning list birey be manipulated form the caller Add/Remove/Update elements. without

(kakım per Mike P's excellent answer) wrap an enumerator to pretend to be enumerable, there are some things that you sevimli't really do - for example, it is hoped

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Bu yöntemler yardımıyla, ölçün huzurlaştırma mantığını bileğalışveriştirerek özel işlemler yapabilir ve uygulamanızın başarımını ve doğruluğunu zaitrabilirsiniz.

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

Where the execution of a query is going to be performed "in process", typically all that's required is the code (birli code) to execute each part of the query.

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 cleaner, your users don't get a list where they shouldn't (they could cast it to a Listafter all) and C# IStructuralComparable Temel Özellikleri you don't need to create a Listobject.

IEnumerable is an interface that tells us that we hayat enumerate over a sequence of T instances. C# IStructuralComparable Nasıl kullanılır If you need to allow somebody to see and perform some action for each object in a collection, this is adequate.

Bu interface, uygulandığı sınıfa GetEnumerator adlı bir metot kazanmıştırrır ve bu C# IStructuralComparable nedir metot geriye IEnumerator interface’ini implement eden bir sınıf döndürür.

In addition to all the answers posted above, here is my two cents. There are many C# IStructuralComparable Nasıl kullanılır other types other than List that implements IEnumerable such ICollection, ArrayList etc.