这是.NET的Regex.Split中的错误吗？ [英] Is this a bug in .NET's Regex.Split?

问题描述

我有两个正则表达式，用于 Regex.Split ：

I have two regular expressions, for use with Regex.Split:

(?<=\G[^,],[^,],)

和

(?<=\G([^,],){2})

拆分字符串 A，B，C，D，E，F，G， ，第一个结果为：

When splitting the string "A,B,C,D,E,F,G,", the first one results in:

A,B, 
C,D, 
E,F, 
G, 

，第二个结果为：

A,B, 
A, 
C,D, 
C, 
E,F, 
E, 
G, 

发生了什么这里？我以为（X）{2} 总是等同于 XX ，但我不确定。在我的实际问题中，我需要做一些复杂得多的事情，并且需要做69次，所以重复模式并不理想。

What is going on here? I thought that (X){2} was always equivalent to XX, but I'm not sure anymore. In my actual problem, I need to do something like quite a bit more complex, and I need to do it sixty nine times, so just repeating the pattern is less than ideal.

推荐答案

摘自 Regex.Split

如果在Regex.Split表达式中使用捕获括号，所有捕获的文本都将包含在结果字符串数组中。

If capturing parentheses are used in a Regex.Split expression, any captured text is included in the resulting string array.

正在捕获内部括号。尝试改用（？：[^，]，）。

The internal parentheses are capturing. Try using (?:[^,],) instead.

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