Regex in Vim

I'm not a regex genius, but with :incsearch, you can incrementally craft quite complex regular expressions with immediate visual feedback. Here's an example; the source file might look familiar if you read my ripgrep post 😁. A video is worth 1000 words in this case.

Regexr is another popular website for working on regular expressions, but vim + :incsearch is much faster for vim users.