$ irb
> segments = 'sub.example.com'.split('.')
=> ["sub", "example", "com"]
> variants = segments.map.with_index { |_, i| segments[i..-1].joi
n('.') }
=> ["sub.example.com", "example.com", "com"]
GNU social JP is a social network, courtesy of GNU social JP管理人. It runs on GNU social, version 2.0.2-dev, available under the GNU Affero General Public License.
All GNU social JP content and data are available under the Creative Commons Attribution 3.0 license.