re = /(?:(\w+) *\(?)?\b(\d+) ?x ?(\d+) ?(cm)\b/
str = '
30 x 30 cm
30x30cm
30x30 cm
Ixxx 30x30cm
xxxx (30x30cm)
xxxx (30 x 30 cm)'
# 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