C# 为什么 IList 不支持 AddRange
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Why doesn't IList support AddRange
提问by Boris Callens
List.AddRange()exists, but IList.AddRange()doesn't.
This strikes me as odd. What's the reason behind this?
List.AddRange()存在，但IList.AddRange()不存在。
这让我觉得很奇怪。这背后的原因是什么？
采纳答案by xanatos
Because an interface shoud be easy to implement and not contain "everything but the kitchen". If you add AddRangeyou should then add InsertRangeand RemoveRange(for symmetry). A better question would be why there aren't extension methods for the IList<T>interface similar to the IEnumerable<T>interface. (extension methods for in-place Sort, BinarySearch, ... would be useful)
因为界面应该易于实现并且不包含“除了厨房之外的所有东西”。如果添加AddRange，则应添加InsertRange和RemoveRange（为了对称）。一个更好的问题是为什么没有IList<T>类似于IEnumerable<T>接口的接口的扩展方法。（就地Sort, BinarySearch, ... 的扩展方法会很有用）
回答by Emilien Mathieu
For those who want to have extension methods for "AddRange", "Sort", ... on IList,
对于那些想要在 IList 上拥有“AddRange”、“Sort”、...的扩展方法的人，
Below is the AddRangeextension method:
下面是AddRange扩展方法：
public static void AddRange<T>(this IList<T> source, IEnumerable<T> newList)
{
if (source == null)
{
throw new ArgumentNullException(nameof(source));
}
if (newList == null)
{
throw new ArgumentNullException(nameof(newList));
}
if (source is List<T> concreteList)
{
concreteList.AddRange(newList);
return;
}
foreach (var element in newList)
{
source.Add(element);
}
}
I created a small library that does this. I find it more practical than having to redo its extension methods on each project.
我创建了一个小型图书馆来做到这一点。我发现它比必须在每个项目上重做其扩展方法更实用。
Some methods are slower than List but they do the job.
有些方法比 List 慢，但它们可以完成工作。
Here is the GitHub to interest them:
这是他们感兴趣的 GitHub：
