将PascalCase字符串拆分为单独的单词

Question

我正在寻找一种方法将PascalCase字符串(例如"MyString")拆分为单独的单词 - "My","String".另一个用户提出了这个问题bash,但我想知道如何使用常规正则表达式或至少在.NET中.

如果你能找到一种方法来分割(并且可选地大写)camelCase字符串:例如,"myString"变成"my"和"String",可以选择大写/小写字符串中的一个或两个.

Answer 1

看到这个问题:是否有一种优雅的方法来解析单词并在大写字母之前添加空格？ 它接受的答案涵盖了你想要的内容,包括连续的数字和几个大写字母.虽然此示例包含以大写字母开头的单词,但当第一个单词为小写时,它同样有效.

string[] tests = {
   "AutomaticTrackingSystem",
   "XMLEditor",
   "AnXMLAndXSLT2.0Tool",
};


Regex r = new Regex(
    @"(?<=[A-Z])(?=[A-Z][a-z])|(?<=[^A-Z])(?=[A-Z])|(?<=[A-Za-z])(?=[^A-Za-z])"
  );

foreach (string s in tests)
  r.Replace(s, " ");

以上将输出:

[Automatic][Tracking][System]
[XML][Editor]
[An][XML][And][XSLT][2.0][Tool]

Answer 2

只是提供RegEx和循环解决方案的替代方案,这里提供的所有内容都是使用LINQ的答案,LINQ也处理驼峰案例和首字母缩略词:

    string[] testCollection = new string[] { "AutomaticTrackingSystem", "XSLT", "aCamelCaseWord" };
    foreach (string test in testCollection)
    {
        // if it is not the first character and it is uppercase
        //  and the previous character is not uppercase then insert a space
        var result = test.SelectMany((c, i) => i != 0 && char.IsUpper(c) && !char.IsUpper(test[i - 1]) ? new char[] { ' ', c } : new char[] { c });
        Console.WriteLine(new String(result.ToArray()));
    }

这个输出是:

Automatic Tracking System  
XSLT  
a Camel Case Word 

Answer 3

回答了另一个问题:

void Main()
{
    "aCamelCaseWord".ToFriendlyCase().Dump();
}

public static class Extensions
{
    public static string ToFriendlyCase(this string PascalString)
    {
        return Regex.Replace(PascalString, "(?!^)([A-Z])", " $1");
    }
}

输出a Camel Case Word(.Dump()只打印到控制台).