c# - 如何去除字符串中重复的字符

Question

我有一个允许用户对照片发表评论的网站。当然，用户会留下如下评论:

'OMGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG!!!!!!!!!!!!!!!'

或

'YOU SUCCCCCCCCCCCCCCCCCKKKKKKKKKKKKKKKKKK'

你明白了。

基本上，我想通过删除至少大部分多余的重复字符来缩短这些评论。我敢肯定有一种方法可以用 Regex 来做到这一点……我就是想不通。

有什么想法吗？

Answer 1

请记住，英语中经常使用双字母，您可能不想盲目地消除它们。这是一个正则表达式，可以去除 double 以外的任何东西。

Regex r = new Regex("(.)(?<=\\1\\1\\1)", RegexOptions.IgnoreCase | RegexOptions.CultureInvariant | RegexOptions.Compiled);

var x = r.Replace("YOU SUCCCCCCCCCCCCCCCCCKKKKKKKKKKKKKKKKKK", String.Empty);
// x = "YOU SUCCKK"

var y = r.Replace("OMGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG!!!!!!!!!!!!!!!", String.Empty);
// y = "OMGG!!"