provision.rb

# Records = [ 'something.example.com', 'some.other.example.com', 'example.net', 'somethingelse.example.net', 'example.org' ]
def domain_records(records)
    records.map { |r|
      base = r.split('.')[1..2].join('.')
      sub_domain = .split('.')[-3].join('.')
    }
end

# Is there a functional way to get a result like..
# { 'example.com' => [ 'something', 'some.other' ], 'example.net' => ['somethingelse'], 'example.org' => [] }
#
# I realize I can create a hash and do an .each to insert records into the map, but is there a way to do this
# without mutable elements using something like .collect?