Değil Hakkında Detaylar bilinen C# IList Kullanımı

Değil Hakkında Detaylar bilinen C# IList Kullanımı

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Arraylist: Etkin boyutludur, eleman ekleme/silme nöbetlemleri daha kolaydır ve farklı veri türlerini saklayabilir.

C# CollectionBase derslikı, özelleştirilebilir koleksiyonların oluşturulmasını esenlar ve bu sayede yazılı sınavm projelerinde esneklik ve gene kullanılabilirlik esenlar.

Say I have a function that returns IEnumerable, inside the function I may use a List for an internal backing store to generate my collection, but I only want callers to enumerate it's contents, derece add or remove. Accepting an interface kakım a parameter communicates a similar message "I need a collection of strings, don't worry though, I won't change it."

Eric LippertEric Lippert 656k182182 gold badges1.3k1.3k silver badges2.1k2.1k bronze badges 14 12 How do you know what the caller needs though. For instance I was switching one of my return types to a IList then I well I am probably just going to enumerate over them anyways lets just return an IEnumberable.

Your code is now broken, because int[] implements IList, but is of fixed size. The contract for ICollection (the base of IList) requires the code that uses it to check the IsReadOnly flag before attempting to add or remove items from the collection. The contract for List does hamiş.

This level of abstraction goes the other direction when it belongs to method parameters. When you pass your list to a method that accepts IEnumerable you güç be sure that your list is derece going to be modified. When you are the person implementing the method and you say you accept an IEnumerable because all you need to do is iterate through that list.

I thought I'd never need to change from a List but had to later change to use a custom list library for the extra functionality it provided. Because I'd only returned an IList none of the people that used the library had to change their code.

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the method, it güç make a huge difference -- if they have an array and you're asking for a list, they have C# IList Kullanımı to change the array to a list or v.v. whenever calling the method, a total waste of time from both a programmer and performance POV.

If you birey consider your method, determine that you probably won't be changing the return collection type, then it is probably safe to return a more exact type. If you aren't sure, or are afraid that if you change it in future you'll be breaking other C# IList Nerelerde Kullanılıyor people's code, then go more general.

Obviously if you are being asked which you use in an interview, you say IList, smile, and both look pleased at yourselves for being so clever. Or for a public facing API, IList. Hopefully C# IList Nasıl Kullanılır you get my point.

I leave this up to show that if you needed to do it (e.g. the off chance a C# IList Nasıl Kullanılır third party library returned a List that you needed to convert for another 3rd party library), you can do it this way.

Dizin tarafından erişilebilen nesnelerin mutlak olarak belirlenmiş bir listesini söz gelişi eder. Listeleri arama, sıralama ve el işi şekilleri C# IList Nasıl Kullanılır katkısızlar.

If you had used IList in the rest of the app you could extend List with your own custom class and still be able to pass that around without refactoring.