小编Sol*_*Sol的帖子

所以我正在尝试学习 Elixir（我有 F# 和 Haskell 的背景），但我很难理解我的代码中发生的事情：

fizz_buzz = fn
  (0, 0, _) -> "FizzBuzz"
  (0, _, _) -> "Fizz"
  (_, 0, _) -> "Buzz"
  (_, _, c) -> c
end

fizz_buzz_rem = fn n -> fizz_buzz.(rem(n, 3), rem(n, 5), n) end


# This works
IO.puts(fizz_buzz_rem.(10))
IO.puts(fizz_buzz_rem.(11))
IO.puts(fizz_buzz_rem.(12))
IO.puts(fizz_buzz_rem.(13))
IO.puts(fizz_buzz_rem.(14))
IO.puts(fizz_buzz_rem.(15))
IO.puts(fizz_buzz_rem.(16))
IO.puts(fizz_buzz_rem.(17))

IO.puts("----------------")

inputs =
  10..17
  |> Enum.to_list

# Doesn't work
inputs
|> Enum.map(fizz_buzz_rem)
|> IO.puts

IO.puts("----------------")

# Doesn't work
inputs
|> Enum.map(fn n -> fizz_buzz.(rem(n, 3), rem(n, 5), n) …

我刚刚开始学习Clojure，并且尝试模拟Monty Hall问题：

(defn create-contest
  "Creates a monty hall doors contest"
  [n]
  (do (def door-with-car (rand-int n))
      (map
       (fn [i] (if (= i door-with-car) :car :closed))
       (range n)))) 

(defn create-doors
  "Create a collection of monty hall contests"
  [doors contests]
  (doall
   (map
     (fn [i] (create-contest i))
     (repeat contests doors))))

但是，每次执行该create-doors功能时，所有带有轿厢的门都位于同一位置：

broker.core> (create-doors 4 10)
((:car :closed :closed :closed)
 (:car :closed :closed :closed)
 (:car :closed :closed :closed)
 (:car :closed :closed :closed)
 (:car :closed :closed :closed)
 (:car :closed :closed :closed) …