如何在不拆分.net 中的单词的情况下拆分行

Question

有没有一种简单的方法可以将一行文本拆分为一系列较短的行，给定一些最大上限而不拆分单词，除非单词本身长于该上限？

Answer 1

您可以匹配以下正则表达式，该表达式将行长度限制为 40 个字符。每个匹配项都是最大长度的非空行，以非空白字符开头和结尾，包含不超过 40 个字符，并且不会破坏给定字符串中非空白字符的子字符串，除非这样的子字符串包含超过40 个非空白字符，在这种情况下，它在第 40 个字符之后断开。

\S{40}| *\r?\n|\S.{0,38}\S(?!\S)

启动你的引擎！

对于字符串：

All good programmers should take note and come to the aid of their company's bowling team.

Moreover, they should always be mindful that non-words, such as abcdefghiabcdefghiabcdefghiabcdefghiabcdefg may need to be split.

Also, blank lines are to be retained.

比赛如下：

          1         2         3       
0123456789012345678901234567890123456789

All good programmers should take note
and come to the aid of their company's
bowling team.

Moreover, they should always be mindful
that non-words, such as 
abcdefghiabcdefghiabcdefghiabcdefghiabcd
efg may need to be split.

Also, blank lines are to be retained.

正则表达式为：“匹配 40 个非空白字符或匹配零个或多个空格、可选的回车和换行符或匹配非空白字符后跟最多 38 个字符，后跟非空白字符后跟一个非空白字符”。“后面没有非空白字符”表示该字符后面是空白字符或者是行中的最后一个字符。(?!\S)是一个负面的前瞻。