re = /^(?:https?:\/\/)?(www\.)?(?:twitter\.com|x\.com)\/@?(\w{1,15})$/m
str = 'http://twitter.com/someuser
https://twitter.com/someuser
https://twitter.com/some_user
https://x.com/someuser
http://x.com/someuser
twitter.com/someuser
x.com/someuser
twitter.com/23123
x.com/this_string_is_bigger_then_15_letters
x.com/213?some=parameter'
# 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