C＃中：你如何检查表是相同的尺寸和放大器;相同的元素？ [英] C#: how do you check lists are the same size & same elements?

问题描述

有串的两个列表

List<string> A;
List<string> B;

什么是最短code，你会建议检查A.Count == B.Count和A在B和反之亦然每一个元素：每一个B是A（A项和B项可能有不同订购）。

What is the shortest code you would suggest to check that A.Count == B.Count and each element of A in B and vise versa: every B is in A (A items and B items may have different order).

推荐答案

如果你不需要担心重复：

If you don't need to worry about duplicates:

bool equal = new HashSet<string>(A).SetEquals(B);

如果您担心重复，即变得稍微别扭。这将工作，但它的速度相对较慢：

If you are concerned about duplicates, that becomes slightly more awkward. This will work, but it's relatively slow:

bool equal = A.OrderBy(x => x).SequenceEquals(B.OrderBy(x => x));

当然，你可以先检查次数，这是一个简单的EX pression这两个选项更有效。例如：

Of course you can make both options more efficient by checking the count first, which is a simple expression. For example:

bool equal = (A.Count == B.Count) && new HashSet<string>(A).SetEquals(B);

...但你问最短code：）

... but you asked for the shortest code :)

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