G
irb(main):019:0> arr = ["car", "bmw / audi / lada" ]
=> ["car", "bmw / audi / lada"]
irb(main):020:0> arr[1].split(' / ').map { |i| ([arr[0], i]) }
=> [["car", "bmw"], ["car", "audi"], ["car", "lada"]]
irb(main):021:0>
=> ["car", "bmw / audi / lada"]
irb(main):020:0> arr[1].split(' / ').map { |i| ([arr[0], i]) }
=> [["car", "bmw"], ["car", "audi"], ["car", "lada"]]
irb(main):021:0>
А без вложенных массивов никак ?
