javascript - 保留文本但消除标签之间的 CR LF

Question

各位正则表达式专家，

我有一个充满表达式的平面文件，例如:

SELECT * FROM CONVENIENT_ONE_LINE_QUERY
"SELECT * FROM THIS_QUERY
WHERE IS_SPREAD_OVER == 123
ORDER BY MULTIPLE_LINES
HAVING AND_IS_BETWEEN_QUOTES"
SELECT * FROM ANOTHER_CONVENIENT_ONE_LINER

我想消除引号和引号本身之间的 CRLF ，这样我的所有查询都是方便的单行语句:

SELECT * FROM CONVENIENT_ONE_LINE_QUERY
SELECT * FROM THIS_QUERY WHERE IS_SPREAD_OVER == 123 ORDER BY MULTIPLE_LINES HAVING BUT_IS_BETWEEN_QUOTES
SELECT * FROM ANOTHER_CONVENIENT_ONE_LINER

请发布解决方案中使用的正则表达式风格。我正在使用 TextCrawler，它声称是 ECMA262(与 VBScript/Javascript 相同)，我最接近的解决方案如下:

(\r\n".*)(.*)\r\n(.*"\r\n)

请原谅我的无知。此致，山猫开普勒

Answer 1

如果下一个 " 位于行尾，您可以首先删除所有 CRLF:

result = subject.replace(/\r\n(?=[^"]*"$)/mg, " ");

说明:

\r\n    # Match a CRLF
(?=     # if and only if
 [^"]*  # it is followed by any number of non-quote characters
 "      # and a quote
 $      # at the end of a line
)       # End of lookahead.

这会将您的示例转换为

SELECT * FROM CONVENIENT_ONE_LINE_QUERY
"SELECT * FROM THIS_QUERY WHERE IS_SPREAD_OVER == 123 ORDER BY MULTIPLE_LINES HAVING AND_IS_BETWEEN_QUOTES"
SELECT * FROM ANOTHER_CONVENIENT_ONE_LINER

然后，在第二步中，删除引号:

result = subject.replace(/^"|"$/mg, "");