反转带有重音字符的字符串? [英] Reverse a string with accent chars?

问题描述

所以我看到了 Jon 的飞碟视频，并且有一个代码示例:

So I saw Jon's skeet video and there was a code sample :

é 应该有问题 - 倒车后，但我想它在 .net2 上失败了(恕我直言)，无论如何它确实对我有用，我确实看到了正确 反转字符串.

There should have been a problem with the é - after reversing but I guess it fails on .net2 (IMHO), anyway it did work for me and I did see the correct reversed string.

char[] a="Les Misérables".ToCharArray();
Array.Reverse(a);
string n= new string(a);
Console.WriteLine (n); //selbarésiM seL

但我更进一步:

在希伯来语中有Alef"字符:א

In Hebrew there is the "Alef" char : א

我可以添加标点符号，如:אֳ(我相信它由 2 个字符组成 - 但显示为一个.)

and I can add punctuation like : אֳ ( which I believe consists of 2 chars - yet displayed as one.)

但是现在看看会发生什么:

But now look what happens :

char[] a="Les Misאֳrables".ToCharArray();
Array.Reverse(a);
string n= new string(a);
Console.WriteLine (n); //selbarֳאsiM seL

有分裂...

我能理解为什么会这样:

I can understand why it is happening :

Console.WriteLine ("אֳ".Length); //2

所以我想知道 C# 中是否有解决此类问题的方法(或者我应该构建自己的机制......)

So I was wondering if there's a workaround for this kind of issue in C# ( or should I build my own mechanism....)

推荐答案

问题是 Array.Reverse 不知道 char 值的某些序列可能组合形成单个字符或字素"，因此不应颠倒.您必须使用能够理解 Unicode 组合字符序列的东西，例如 TextElementEnumerator:

The problem is that Array.Reverse isn't aware that certain sequences of char values may combine to form a single character, or "grapheme", and thus shouldn't be reversed. You have to use something that understands Unicode combining character sequences, like TextElementEnumerator:

// using System.Globalization;

TextElementEnumerator enumerator =
    StringInfo.GetTextElementEnumerator("Les Misאֳrables");

List<string> elements = new List<string>();
while (enumerator.MoveNext())
    elements.Add(enumerator.GetTextElement());

elements.Reverse();
string reversed = string.Concat(elements);  // selbarאֳsiM seL

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