将单字符串向量映射到 PersistentMap

Question

我正在尝试通过 HashMap 音译列表，如下所示:

(map {"a" 0 "b" 1 "c" 2} ["a","c","b","a"])

我想吐槽一下:

[0,2,1,0]

我该怎么做？

更正:上面的方法有效，但这不行:

  (map {"a" 0 "b" 1 "c" 2} (vec "acba"))

这里有什么不同？

Answer 1

改用mapv

user=> (map {"a" 0 "b" 1 "c" 2} ["a" "c" "b" "a"])
(0 2 1 0)
user=> (mapv {"a" 0 "b" 1 "c" 2} ["a" "c" "b" "a"])
[0 2 1 0]

还有:

user=> (map {"a" 0 "b" 1 "c" 2} (vec "acba"))
(nil nil nil nil)
user=> (vec "acba")
[\a \c \b \a]
user=> (= \a "a")
false

这行得通(但是是迂回的):

user=> (mapv {"a" 0 "b" 1 "c" 2} (map str (vec "acba")))
(0 2 1 0)