/regex

✨ regex cheat sheet

regex (Cheat Sheet)

Note

This is a cheat sheet on regular expressions (mostly notes-to-self). They are incomplete by default.

Example: Match the strings \( or \).

Source: ChatGPT

\\\( | \\\)

In regex, since both the backslash (\) and the parentheses (( and )) are special characters, you will need to escape them using double backslashes (\\).

  • \\\(: This matches the string \(. The double backslashes \\ escape the backslash itself in regex, and the \( escapes the opening parenthesis.
  • |: This is the OR operator, meaning either the left-hand side or the right-hand side should match.
  • \\\): Similarly, this matches the string \), where the first two backslashes escape the backslash, and the third backslash escapes the closing parenthesis.