Greatest Kılavuzu C# IEnumerable Nerelerde Kullanılıyor için

Greatest Kılavuzu C# IEnumerable Nerelerde Kullanılıyor için

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Implementation of IEnumerable is generally the preferred way for a class to indicate that it should be usable with a "foreach" loop, and that multiple "foreach" loops on the same object should operate independently.

are two properties in particular—one that points to a query provider (e.g., a LINQ to SQL provider) and another one pointing to a query expression representing the IQueryable object bey a runtime-traversable abstract syntax tree that birey be understood by the given query provider (for the most part, you dirilik't give a LINQ to SQL expression to a LINQ to Entities provider without an exception being thrown).

So unless you want to perform operations that are more efficient on the list, this really does mean lower performance.

Özellikle Dictionary, HashSet üzere bilgi dokumalarıyla baş başa kullanılarak özelleştirilmiş kontralaştırmalar sağlar. Böylelikle, farklı bilgi tipleri yahut karmaşık zıtlaştırma kuralları gerektiren durumlarda kullanıcıya suples esenlar.

This will create a new list element for each element in memory, enumerating the IEnumerable and is thus less performant if you only enumerate once - but safer and sometimes the List methods are handy (for instance in random access).

I noticed that if I use "Distinct", the "inner" contains 6 items (this is incorrect as only 2 are Distinct), but the "outer" does contain the correct values. Again, probably the delegated methods determine this but this is a bit more than I know about IEnumerable.

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

Koleksiyonlar Arasında Gezinmeyi Esenlar: IEnumerable, koleksiyonlar arasında kolayca gezinmenizi sağlar. GetEnumerator metodu ile koleksiyonun her bir elemanına erişebilir ve bu elemanlar üzerinde muamele yapabilirsiniz.

) without affecting original veri." is confusing. Do you mean that the new list returned güç been added to, and elements hayat be removed but no updates? I thought that because it returned ienumerable you sevimli modify the elements in the list, i.e. change a property like you said but you yaşama't add and remove items in the list. Is that correct?

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 C# IEnumerable Nasıl Kullanılır type of enumerable. IMHO, there should 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 was modified should be allowed to return 'sensible' data if it's able to do so or throw an exception if it hayat't, and an ISafeEnumerable, which would be expected to work sensibly (without throwing an exception) even if a collection changes. A bit late now to change things, though.

Any idea why the Enumerable is "split" into C# IEnumerable Temel Özellikleri "inner" and "outer"? This happens when I inspect the element in debug/break mode via mouse. Is this perhaps Visual Studio's contribution? Enumerating on the peşin and indicating input and output C# IEnumerable Nerelerde Kullanılıyor of the Enum?

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IEnumerator kullanarak, koleksiyonun hepsinı belleğe yüklemeden, yalnızca lüzumlu elemanları maslahatler ve C# IEnumerable Kullanımı bu sayede belleğin çalışan kullanılmasını sağlar.

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