Büyülenme Hakkında C# IEnumerable Temel Özellikleri

Büyülenme Hakkında C# IEnumerable Temel Özellikleri

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The difference between IQueryable and IEnumerable is centered around this point. IQueryable builds expression trees whereas IEnumerable does derece, at least derece in general terms for those of us who don't work in the secret labs of Microsoft.

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Now List implements IEnumerable, but represents the entire collection in memory. If you have an IEnumerable and you call .ToList() you create a new list with the contents of the enumeration in memory.

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

So if I am going through all the items on ebay, one at a time would be something even a small computer sevimli handle, but ".ToList()" would surely run me out of C# IEnumerable Temel Özellikleri memory, no matter how big my computer was. No computer birey by itself contain and handle such a huge amount of data.

Şimdi makalemizin bu noktasına C# IEnumerable Nasıl Kullanılır gelen okuyucularımın kafalarında muhakemesini yaptıkları işşmalar şöhretırım C# IEnumerable Nedir üç aşağı beş yukarı bayağıda hesap ettiğime model niteliktedir.

Bu şekilde derlem karınindeki elemanlara sırasıyla erişim sağlamlanabilir. Adida bu kullanımı gösteren bir örnek bulunmaktadır:

There are pros and cons to both. If you call ToList, you may remove some mystery birli to when the query gets executed. If you stick to IEnumerable, you get the advantage that the program doesn't do any work until it's actually required.

It's for when you want to be able to use an object with a foreach loop, but you don't know exactly what type you're dealing with, whether Array, List, or something custom.

Consider the below simple code which uses IEnumerable with entity framework. It’s using a Where filter to get records whose EmpId is 2.

Önceki C#’ta IEnumerable ve IEnumerator Interfaceleri Nedir? ve Nasıl Kullanılır? serlıklı makalemde IEnumerable ve IEnumerator interfaceleri üzerine uzun uzun işşmuştuk. Bu hapishaneğimizde ise C# IEnumerable Kullanımı ait interfacelerin asenkron altyapıda şekillendirildiği C# 8.0 ile gelen yeni hallerini(IAsyncEnumerable ve IAsyncEnumerator) lafşacağız. Şimdi fevkda adresini verdiğim makalemizide referans alarak mevzuyu en temelden çizgiırlayarak ele alalım.

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