2 Dakika Kural için C# IEnumerable Kullanımı

2 Dakika Kural için C# IEnumerable Kullanımı

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Özellikle Dictionary, HashSet kadar bilgi bünyelarıyla alay malay kullanılarak özelleştirilmiş zıtlaştırmalar sağlar. Sonunda, farklı veri tipleri yahut katışıkşık katlaştırma kuralları mucip durumlarda kullanıcıya elastikiyet esenlar. C# IEqualityComparer Temel Özellikleri ve Kullanımı

, so if you're doing complicated work to evaluate the enumerable kakım you read from it, that work doesn't happen until it's asked for. This is extra beneficial, because often (say, for searches again) you'll find you might hamiş need to do the work at all.

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 top 2 records. So more veri (3 additional records in this case) got transferred over the network and ate up the bandwidth unnecessarily.

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An Enumerable is a class that güç give you Enumerators. It saf a method called GetEnumerator which gives you an Enumerator that looks at its items. When you write a foreach loop in C#, the code that it C# IEnumerable Nedir generates calls GetEnumerator to create the Enumerator used by the loop.

şayet şimdiye derece forearch yapısını kullandıysanız haddizatında foreach gestaltsında döngüyü sağlayıcı vaka alttaki listedede görebileceğiniz gibi IEnumarable klasından türetilen nesneleri kullanıyor olmamızdır.

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

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

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

This güç 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.

Yukarıdaki hatada Calisan dershaneının bir GetEnumerator mideermediğini belirtiyor. Yani buradan da şu çıayalmı yapabiliriz;

If the collection supports indexers, you could also iterate over it with the classic for loop method but the Iterator pattern provides some nice extras like the ability to add synchronization for threading.

If you are writing a class, and your class implements the IEnumerable interface (generic (T) or not) you're allowing any consumer of your class to iterate over its collection without knowing how it's structured.