C# IEnumerable Nedir Üzerinde Buzz söylenti

C# IEnumerable Nedir Üzerinde Buzz söylenti

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The difference between IQueryable and IEnumerable is centered around this point. IQueryable builds expression trees whereas IEnumerable does not, 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 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 bütünüyle 2 records. So more data (3 additional records in this case) got transferred over the network and ate up the bandwidth unnecessarily.

For example, if you do derece need to access items by index, but constantly insert items at the beginning of your collection and then remove items from the end, a Queue would be far more appropriate to use.

Sonunda burada ortaya çıhun sonuç; IEnumerable interfaceinin uygulandığı sınıfa zorla GetEnumerator adlı metot implement ettirilmektedir. IEnumerator ise müntesip sınıfa iterasyon konuleminde kullanılacak elemanları ve özellikleri kazandırmaktan mesuliyetli olacaktır.

So if you working with only in-memory data collection IEnumerable is a good choice but if you want to query veri collection which is connected with database `IQueryable is a better choice bey it reduces network traffic and uses the power of SQL language.

This is a birçok video on youtube which demonstrates how these interfaces differ , worth a watch. Below goes a long descriptive answer for it.

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Else use an IEnumerable. The default should be to use the on-demand evaluation in the C# IEnumerable Temel Özellikleri second example, bey that generally uses less memory, unless there is a specific reason to store the results in a list.

Marc GravellMarc Gravell 1.0m271271 gold badges2.6k2.6k silver badges2.9k2.9k bronze badges 1 1 The mistake with "Reset" was with just having one type of enumerable. IMHO, there should C# IEnumerable Nedir have been an IMultipassEnumerable, inheriting IEnumerable, which would support Reset and guarantee that multiple passes will either return identical data or throw an exception; an ordinary IEnumerable whose collection C# IEnumerable Temel Özellikleri was modified should be allowed to return 'sensible' veri if it's able to do so or throw an exception if it birey't, and an ISafeEnumerable, which would be expected C# IEnumerable Nerelerde Kullanılıyor to work sensibly (without throwing an exception) even if a collection changes. A bit late now to change things, though.

This yaşama 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.

a reset on enumerators, but this is largely a design mistake and shouldn't be used (it is even a formal requirement in the spec that iterator blocks throw an exception if you call it).

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Here is why it loads twice kakım fewer items birli the first example on average. Let's say probability to find element at any position in the range of files is the same.