转换列表<T>反对[] [英] Convert List<T> to object[]
问题描述
我正在寻找一种将 List 转换为 object[] 的单行代码.这是一个班轮，所以我对诸如 foreach 或 for...
I am looking for a one liner that transforms List<T> into object[]. It's one liner, so I am not interested in solutions such as foreach, or for...
有人接受吗?
提示:不，List 和 List 都不起作用.
Hint: No, both List<T>.ToArray() and List<T>.ToArray<object>() don't work.
为什么 List 不起作用?因为它无法编译.
Why List<T>.ToArray<object>() doesn't work? Because it can't compile.
推荐答案
mylist.Cast<object>().ToArray()
顺便说一下，这只会迭代一次，以防您对性能感到疑惑.在).:)
That will only iterate once, by the way, in case you were wondering about the performance. O(n). :)
为什么?好吧，因为 Cast使用延迟执行并且在 ToArray() 迭代列表之前实际上不会做任何事情.
Why? Well, because Cast<object> will use deferred execution and won't actually do anything until the list is iterated by ToArray().
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