标记后的第一个字母大写

Question

我正在尝试想出一种搜索和替换方法来将标记后的第一个字母大写，但我没有运气。

我正在使用Notepad++的正则表达式模式。

Answer 1

在 Notepad++ 中，在查找和替换对话框中启用正则表达式模式，然后查找：

(?<=<p>)(.)

并替换为：

\U\1

解释要匹配的模式：

(?<=a)b   # A positive lookbehind, i.e. match all b that immediately follow a, but
          #   don't match the "a" itself.
(.)       # Find any character (i.e. "."), and capture it.
(?<=a)(.) # Find any character that immediately follows a, and capture it.

以及替换：

\1   # The first captured substring in each match.
\Ux  # Convert x to upper case.
\U\1 # Convert the first captured substring in each match to upper case.

请注意，这会尝试将第一个 字符 转换为大写。如果<p> 和您想要大写的字母之间可能有其他非字母字符，您可以使用以下模式：

(?<=<p>)([^A-Za-z]*)(.) 

# [^x]       Matches any character that is not x.
# [^A-Za-z]  Matches any character that is not one of the upper case 
#              or lower case letters.
# x*         Matches zero or more consecutive x.
# [^A-Za-z]* Matches zero or more consecutive characters that are not
#              upper case or lower case letters.

并替换为

\1\U\2 # The first captured substring (any non-letter characters
       #   that immediately follow <p>) followed by the second captured
       #   substring (the first letter that appears after <p>), which 
       #   is converted to upper case.

要找到的模式说：“匹配（并在捕获组 1 中捕获）紧跟在 <p> 之后的任何非字母字符，然后匹配（并在捕获组 2 中捕获）紧随其后的第一个字符跟随非字母字符（当然，它必须是我们要确保是大写的字母）”。请注意，因为我们使用*，所以当<p> 后面没有非字母字符时也会产生匹配，在这种情况下，捕获组一将只包含一个空字符串。

Answer 2

/<p>\s*(.){1}/

这将匹配 <p> 标记，后跟任意类型的空格零次或多次，后跟任意字符 1 次，它会记住第 1 个字符，以便您以后可以使用它将其转换为大写。