re = /^[a-z.'"#]+$/mi
str = 'This.is.the.first#....valid...l\'i\'n\'e
Jonh\'s.valid.string
this is not valid
another1nv4l1d'
# 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