re = /(- ?)(?!.*@(?:done|things)).*$/m
str = 'title
- hi
- I am @done
- Added to @things
- Test is @done
a note
another note
- Then a task
- another task @done'
# Print the match result
str.scan(re) do |match|
puts match.to_s
end
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Ruby, please visit: http://ruby-doc.org/core-2.2.0/Regexp.html