re = /^([0-9]*(\^[ABC][0-9]*)+|[0-9]+)$/m
str = '43AA34C563B3545
43A34C563^BC3545
4334563^B3545
3345664345^CCC0
3345
4334563^B4
^B^B'
# 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