正则表达式来移除特定字符重复 [英] Regex to remove a specific repeated character

问题描述

我想创建在C＃中，去除如果重复它一个特定的字符，所以它不是字符串的最后一个字符一个正则表达式

I would like to create a regex in C# that removes a specific character if it is repeated and so it is not the last character of the string.

例如：

"a--b-c-" => "a-b-c"
"-a-b--c" => "a-b-c"
"--a--b--c--" => "a-b-c"

我从来没有想要的 - 反复，我从来没有想这是第一个或最后一个我的性格字符串。我怎么能写一个正则表达式来做到这一点？

I never want the - repeated, and I never want it to be the first or last character of my string. How could I write a regex to do this?

推荐答案

大概最容易做的这两个步骤。首先替换一个或多个的每次出现 - 跟单 - ，然后修剪任何前导/尾随 -

Probably easiest to do this in two steps. First replace each occurrence of one or more "-" with a single "-", then trim any leading/trailing "-".

var reducedString = Regex.Replace(inputString, "-+", "-");

var finalString = reducedString.Trim('-');

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