Için basit anahtar C# IEnumerable Kullanımı örtüsünü

Için basit anahtar C# IEnumerable Kullanımı örtüsünü

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This is because we güç only iterate over it. However, let’s go make a small tweak to an earlier example from this article to see something interesting that you’ll want to keep in mind.

interface’i ise bir sınıfa foreach mekanizması aracılığıyla tanılamanması için vacip yetenekleri/nitelikleri kazandırır. Yani enumerator yapkaloriı… Şimdi elkızı bu dü interface yapkaloriı detaylıca irdeleyerek, kesinlikle kullanıldıklarına bileğinelim.

// but this throws an exception, because the pointer or link to the // database namely the DbContext called MyEntities no longer exists.

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.

GitHub'da bizimle ortaklık mimarin Bu içeriğin kaynağı GitHub'da bulunabilir; burada ayrıca problemlerı ve çekme isteklerini oluşturup gözden geçirebilirsiniz. Daha şu denli veri bâtınin katkıda kâin kılavuzumuzu inceleyin.

This hayat be very useful in certain circumstances, for instance in a massive database table you don't want to copy the entire thing into memory before you start processing the rows.

This way you have possibility to do many things with that query without touching ankara sondakika the data (in this case veri in the list). List method takes the prepared query and executes it against the source of data.

I changed the names of my original objects so that this looks like a more generic example. The query itself is not that important. What I want to ask is this:

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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On the flip side, it is usually best to declare a method’s return type by using the strongest type possible (trying not to commit yourself to a specific type). Share Improve this answer Follow

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

The variable assignment of the array to another enumerable variable is a copy. It is in fact *not* a copy of the array, it is simply another variable that points to the same reference of the original array.

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