This method will go through all the children in a multidimensional array.

walk_multidimensional_array.rb

array = [:first,:first,[:second,:second,[:third,:third,[:fourth,:fourth]]]]

def walk(array)
    if array.class == Array
      array.each do |item|
        if item.class == Array
          item.each { |i| walk(i) }
        else
          puts item
        end
      end
    else
      puts array
    end
end

walk(array)