反转字符串口音字符？ [英] Reverse a string with accent chars?

问题描述

所以我看到乔恩双向飞碟视频并有一个code样品：<​​/ em>的

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

目前应该是一个问题的电子 - 倒车后视，但我想它在失败.NET2（恕我直言），反正它的工作对我来说，我确实看到了中的正确的逆转字符串。

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

但我把它进一步的：

But I took it further:

在希伯来文就有了阿勒夫字符：א

In Hebrew there is the "Alef" char : א

和我能加标点符号，如：אֳ（我相信包括2个字符 - 但显示为一个）

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

但现在看会发生什么：

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

有一个分裂...

There was a split...

我可以理解为什么它正在发生：

I can understand why it is happening :

Console.WriteLine ("אֳ".Length); //2

所以我在想，如果有一个变通方法对于这种问题在C＃（或者我应该建立自己的机制......）

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 不知道炭值可以结合以形成一个单一的字符，或者字形，并且因此不应该被逆转。你必须使用的东西，了解统一code组合字符序列，如<一href="http://msdn.microsoft.com/en-us/library/system.globalization.textelementenumerator.aspx">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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