2 Dakika Kural için C# IEnumerable Temel Özellikleri

2 Dakika Kural için C# IEnumerable Temel Özellikleri

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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:

In case of IEnumerable, only lines up to the element of interest will be read from the file. In case of ToList call over the enumerable, the entire file would be read before even starting the search.

Umumi sıfır bir koleksiyon üzerinde olağan bir yinelemeyi destekleyen bir numaralandırıcıyı kullanıma sunar.

It's effectively usage as documentation of intent; I find that those explicit documentations of intent tend to provide exactly that decoupling you point out.

By adding on a Where statement you aren't actually doing much of anything, you're just adding an extra filter to the query so that later on, when you actually evaluate the sequence (in this case, when ToList is called) those filters will all be applied.

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

Velhasıl… Yapmış olduğumız bu fiillemler neticesinde “Personeller” dershaneımız, içinde bir “Personel” done kümesi çitndıran ve bu data kümesi üzerinde itere edilebilir bir nitelik sunma eden bir klas mahiyetindedir.

It is a best practice to implement IEnumerable and IEnumerator on your collection classes to enable the foreach (For Each in Visual Basic) syntax, however implementing IEnumerable is derece required. If your collection does derece C# IEnumerable Nerelerde Kullanılıyor implement IEnumerable, you must still follow the iterator pattern to support this syntax by providing a GetEnumerator method C# IEnumerable Temel Özellikleri that returns an interface, class or struct.

) without affecting original data." is confusing. Do you mean that the new list returned kişi been added to, and elements kişi be removed C# IEnumerable Nasıl Kullanılır but no updates? I thought that because it returned ienumerable you güç 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?

Örneğin, bir List veya ArrayList kabil koleksiyonların sineindeki verileri sıralı bir şekilde kaplamak veya belirli bir koşula gereğince filtrelemek midein IEnumerator kullanılabilir. Bu, yazılım geliştirme sürecinde verimliliği pozitifrır ve kodun okunabilirliğini iyileştirir.

" This is false, because the where clause is getting called on an IEnumerable and that only knows how to loop through objects which are already coming from the database. If you made the return of AllSpotted() and the parameters of Feline() and Canine() into IQueryable, then the filter would happen in SQL and this answer would make sense.

something is up with your image link, its hamiş rendering in the post body for some reason codeproject.com/KB/cs/646361/WhatHowWhere.jpg

RastoRasto 17.6k4848 gold badges161161 silver badges253253 bronze badges 5 1 C# IEnumerable Temel Özellikleri Unfortunately you have to make your own. The most conservative approach would be for you to cache all the items inside your new enumerable, to handle enumerators that can only be enumerated once, so there is no general class for this in the runtime.

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