re = /(?<=user id\s*(-|:|is)\s)[A-Z].*"/m
str = 'user id - XXX XXX
user id- XXX XXX
user id XXX XXX
user id: XXX XXX
user id : XXX XXX
user id is XXX XXX'
# 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