Elixir 練習問題 ListsAndRecursion-4

^o^ > iex practice_7_4.exs
Eshell V8.0  (abort with ^G)
Interactive Elixir (1.3.4) - press Ctrl+C to exit (type h() ENTER for help)
iex(1)> MyList.span(3, 7)
[3, 4, 5, 6, 7]

mapreduce も使ってないな。