为什么减少一个帐号后停止？

Question

我编写gen-sim-map函数的方式出了点问题。它在一个帐号后停止，并在向量中的最后一个号码后停止。我想知道我做错了什么。我可以通过对函数应用repeat来解决问题，但这对我来说似乎不对。

这是数据和电话;函数defs低于该值。

(def acct-nums (gen-acct-nums 5))
#'ba1-app/acct-nums

ba1-app=> acct-nums
[10000 10001 10002 10003 10004 10005]

ba1-app=> (gen-sim-map acct-nums)
{10005 [\W 160.12]}

(defn random-trans 
    [] 
    (nth avail-trans (.nextInt random (count avail-trans))))

(defn random-amount
    []
    (float (/ (.nextInt random (count (range 1 10000))) 25 )))

; Generate an account number. The range is arbitrary to make it look a real bank account #.
(defn gen-acct-nums [range-end-idx]
    (vec (range 10000 (+ 10000  range-end-idx 1))))

(defn gen-sim-map [acct-nums]
    (reduce
        (fn [sim-map one-acct-num]
            (let [trans (random-trans )
                  amt   (random-amount )]
                { one-acct-num (vector trans amt) } ))
        {}
        acct-nums))

Answer 1

我怀疑你的问题是你没有更换累加器。我希望看到像

这样的东西

(defn gen-sim-map [acct-nums]
    (reduce
        (fn [sim-map one-acct-num]
            (let [trans (random-trans )
                 amt   (random-amount )]
                (assoc sim-map one-acct-num (vector trans amt)) )) ; <---
        {}
        acct-nums))

或类似。