[4] pry(main)> array = Array[1,2,3,'user_id'] => [1, 2, 3, "user_id"] [8] pry(main)> sorted_array = array.map(&:to_i) => [1, 2, 3, 0] [9] pry(main)> sorted_array = array.map(&:to_i).uniq => [1, 2, 3, 0] [10] pry(main)> sorted_array = array…