如何在行中的拆分器之前删除重复的用户名？

• Ctrl+H
• 找什么：^((.*?:).+\R)(\2.+\R)+
• 用。。。来代替：$1
• 检查 环绕
• CHECK 正则表达式
• 取消选中 . matches newline
• Replace all

解释：

^       # beginning of line
    (       # start group 1
        (       # start group 2
            .*?     # 0 or more any character but newline, not greedy
            :       # a colon
        )       # end group 2
        .+      # 0 or more any character but newline
        \R      # any kind of linebreak (i.e. \r, \n, \r\n)
    )       # end group 1
    (       # group 3, you can use (?: for non capture group
        \2      # back reference to group 2 (i.e. the part before the colon)
        .+      # 0 or more any character but newline
        \R      # any kind of linebreak (i.e. \r, \n, \r\n)
    )+      # end of group 3, may appear 0 or more times

替代品：

$1          # content of group 1, the value of the first line

截图（之前）：

截图（之后）：