re = /^(?:\+(?<code>\d))?(?<number>\d+)$/m
str = '+718341233124
+118341233124
518341233124
d718341233124
+71834123adg3124
7-18341233124
'
# 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