匹配部分重复的行 [英] Match Partially Duplicated Lines

问题描述

列表中的行有时与第一个空格字符相似，然后可以更改（即之后的日期）。

I have rows in a list that are sometimes similar up to the first "space" character, then can change (i.e. a date afterwards).

wsmith jul/12/12
bwillis jul/13/13
wsmith jul/14/12
tcruise jul/12/12

我可以轻松地对行进行排序，但是我希望删除重复的过时条目。我确实找到了一个正则表达式建议，但它仅匹配完全相同的行。我需要能够在文件中标记相似用户名的整行。在上面的示例中，第1行和第3行将突出显示。

I can easily sort the lines, but I'd love to remove the duplicate later dated entry. I did find a regex suggestion, but it matches only exactly the same lines. I need to be able to mark the entire row of similar usernames in the file. In my example above, lines 1 and 3 would be highlighted.

（为清楚起见进行编辑）

(edited for clarity)

推荐答案

PCRE 引擎（由Notepad ++使用）中的一个紧凑公式，用于查看是否存在从一行到另一行的重复

A compact formula in the PCRE engine (used by Notepad++) to see if there is repetition from one row to another would be

(?m)^(\S+).*\R(?s).*?\K\1

这将在N ++中工作。

This will work in N++.

当您删除重复的行时，更多内容可能会被标记，因为最初的正则表达式会跳过中间的行以突出显示重复项。

As you remove duplicate lines, more may become marked, because initially the regex skips over the in-between lines in order to highlight the duplicate.

说明

• （？m）启用多行模式，允许 ^ 和 $ 在每行上匹配


• ^ 锚断言我们在字符串的开头


• （\ S +）将非空格字符捕获到组1


• 。* 到行尾


• \R 换行符


• （？s） 激活 DOTALL 模式，允许点跨线匹配


• 。* ？懒惰地匹配字符，直到...


• \K 告诉引擎放弃什么与最终比赛相距甚远，它会返回


• \1 后向引用：匹配第1组之前捕获的内容。

• (?m) turns on multi-line mode, allowing ^ and $ to match on each line
• The ^ anchor asserts that we are at the beginning of the string
• (\S+) captures non-space chars to Group 1
• .* gets to the end of the line
• \R line break
• (?s) activates DOTALL mode, allowing the dot to match across lines
• .*? lazily match chars up to ...
• The \K tells the engine to drop what was matched so far from the final match it returns
• \1 back-reference: match what Group 1 captured before.

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