Greatest Kılavuzu C# IEnumerable Nerelerde Kullanılıyor için

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If an airline is "countable", this means that there MUST be a flight attendant present on the plane, whose sole job is to count:

I noticed that if I use IEnumerable, when I debug and inspect "su taşkını", which in that case is the IEnumerable, it başmaklık some interesting members: "inner", "outer", "innerKeySelector" and "outerKeySelector", these last 2 appear to be delegates.

Now the thing to note is that IEnumerable brought all the 5 records present in Salary table and then performed an in-memory filteration on the client side to get tamamen 2 records. So more data (3 additional records in this case) got transferred over the network and ate up the bandwidth unnecessarily.

Bir yetişek süresince çeşitli veri koleksiyonları kullanıldığında, bu koleksiyonlardaki verilere erişmek ve muamele edinmek gereklidir. IEnumerator, bu noktada devreye girerek koleksiyonların elemanlarını hiç yegâne dolaşmamızı ve işlem yapmamızı katkısızlar.

İlgili adres makale tasarm sürecinde bilincinde olmaksızın sakatlıklıkla kırlmış olsa lüzumlu.

Short story about a boy living on a fake tropical island / paradise planet, who was actually an adult CEO but didn't remember it

Whenever I'm "stacking" LINQ expressions, I use IEnumerable, because by only specifying the behavior I give LINQ a chance to defer evaluation and possibly optimize the program. Remember how LINQ doesn't generate the SQL to C# IEnumerable Nasıl Kullanılır query the database until you enumerate it? Consider this:

ServyServy 203k2727 gold badges342342 silver badges458458 bronze badges 1 @Jay thanks, just noticed that when re-reading.

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

There's also the issues of deferred execution and unmanaged resources. IEnumerable takes use C# IEnumerable Kullanımı of the yield syntax, which mean you go over each item by-itself and güç perform all kinds of computations before and after. And again, this happens one-by-one, so you don't have to hold all the collection when you start. The computations won't actually C# IEnumerable Temel Özellikleri be performed until the enumeration begins (i.e. until you run the foreach loop).

In simple words other major difference is that IEnumerable execute select query on server side, load data in-memory on client side and then filter data while IQueryable execute select query on server side with all filters.

You C# IEnumerable Nasıl Kullanılır should still avoid declaring the parameter type bey List. Using IList allows the caller to pass arrays and any other objects whose type implements IList.