re = /[0-9A-F][0-9A-F][0-9A-F]/m
str = '1H8 4E2 8FF 0P1 T8B 776 42B G12'
# 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