def some_method(*what)
    case what
    when :a then puts "a"
    when :b then puts "b"
    when :c then puts "c"
    else
      if what.is_a? Array
        what.each { |the_mode|
          puts the_mode.class
          some_method(the_mode)
        }
      end
    end
  end

  some_method(:a, :b, :c)