需要更多正则表达式调整建议

发布于 2024-12-07 01:43:52 字数 394 浏览 0 评论 0原文

感谢 SO 的帮助，我正在向大型参考文件添加分隔符。现在就快到了。我有一个从 SO 成员那里收到的正则表达式，它允许我添加“|”作者和年份之间。我知道需要添加“|”文章和出版物之间。我想出的规则是我想添加“|”在出版物名称中“:”之前的最后一个句点（点）之后。我尝试编辑我对此的积极展望，但似乎不起作用。我一如既往地感谢您对此的意见。提前致谢。

实际上我可能甚至不需要指定后面的 3 个“|”规则。主要的事情是匹配“:”之前的最后一个句点。那是正确的吗？即便如此，我的正则表达式似乎不起作用。

^((?:[^|]+\|){3}.*?\.)(?=\:)

122| Ryan, T.N. |2002. |Some article name here. Publication name 2: 101-105.

原文

I'm getting through adding delimiters to a large references file thanks to help from SO. Almost there now. I have a regex which I received from an SO member which allowed me to add the "|" between the author and year. I know need to add "|" between the article and publication. The rule I cam up with is that I want to add the "|" after the last period(dot) that precedes the ":" in the publication name. I tried editing my positive look ahead for this but it does not seem to work. I would appreciate your input on this as always. Thanks in advance.

Actually I probably don't need even to specify the after 3 "|" rule. The main thing would be to match to the last period that precedes the ":". Would that be correct. Even so my regex does not seem to be working.

^((?:[^|]+\|){3}.*?\.)(?=\:)

122| Ryan, T.N. |2002. |Some article name here. Publication name 2: 101-105.

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我不会写诗 2024-12-14 01:43:52

好吧，有两个问题：

你忘记了在句号和冒号之间有一些东西用于前瞻！ :)
句点之前没有贪婪匹配，因此它匹配第一个句点而不是最后一个

尝试：

'^((?:[^|]+\|){3}.*\.)(?=[^:]*?\:)'

看到区别了吗？（删除了 ?，添加了 [^:]*）

Okay 2 problems:

You forgot that there is stuff between the period and the colon for the lookahead! :)
You did not have a greedy match before the period, so it was matching the first period instead of the last

Try: