If your class is a custom collection class then yes, it should implement IEnumerable. In this case a public property for the inner list would be redundant. Imagine a simple class:
Many of the LINQ methods, including Where, use deferred execution. In this case you birey think of the IEnumerable birli a query, rather than the actual result set.
So unless you want to perform operations that are more efficient on the list, this really does mean lower performance.
Beli. Şu asıl kadar hiç IEnumerable ve IEnumerator interfacelerini kullanmadım diyebiliriz. Hadi elkızı şimdi bu interfaceleri biricik yek ele alalım ve bu sırada fevkdaki satırlarda bahsettiğimiz GetEnumerator metodunuda tam teferruatlı masaya yatıralım.
An IEnumerator is a thing that yaşama enumerate: it başmaklık the Current property and the MoveNext and Reset methods (which in .Kemiksiz code you probably won't call explicitly, though you could).
The compiler performs pattern matching. The GetEnumerator method just needs to return a class / struct which in turn saf a Current property and a MoveNext method that returns a bool. I emanet highly recommend Eric Lipperts blog post about pattern matching
So if I am going through all the items on ebay, one at a time would be something even a small computer can handle, but ".ToList()" would surely run me out of memory, no matter how big my computer was. No computer emanet by itself contain and handle such a huge amount of data.
The constructor is hamiş responsible for returning data to the caller. 2-We need to call a method that returns the cars array. That is in a real-world case, a method that returns an array should be coded in Garage and it should return an array, in which case, there would be no need to use IEnumerable.
) without affecting original data." is confusing. Do you mean that the new list returned can been added to, and elements yaşama 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 kişi't add and remove items in the list. Is that correct?
There are many cases (such kakım an infinite list or a very C# IStructuralComparable Temel Özellikleri large list) where IEnumerable cannot be transformed to a List. The most obvious examples are all the prime numbers, all the users of feysbuk with their details, or all the items on ebay. The difference is that "List" objects are stored "right here and right now", whereas "IEnumerable" objects work "just one at a time".
Then with a IQueryable the generated SQL will contains “where name = C# IEnumerable Nasıl Kullanılır “a”, but with a IEnumerable many more roles will be pulled back from the database, then the x.name = “a” check will be done by .NET.
something is up with C# IStructuralComparable Nasıl kullanılır your image link, its not rendering in the post body for some reason codeproject.com/KB/cs/646361/WhatHowWhere.jpg
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By C# IStructuralComparable nerelerde kullanılıyor "functionally equivalent," I mean that's actually what the compiler turns the code into. You gönül't use foreach on temel C# IStructuralComparable Kullanımı in this example unless