如何在clojure中生成随机字母数字字符串？
我一直在尝试编写一个脚本，该脚本创建一个包含 20 个字母的随机字母数字并将其附加到链接的末尾。我坚持制作字母数字。任何帮助，将不胜感激！
回答
(apply str (repeatedly 20 #(rand-nth "abcdefghijklmnopqrstuvwxyz0123456789")))
- there is no reason to prefer `reduce str` over `apply str` here. moreover `reduce str` is dramatically slower, since it leads to the creation of multiple obsolete StringBuilder instances, instead of one instance with `apply`. see the [source](https://github.com/clojure/clojure/blob/clojure-1.10.1/src/clj/clojure/core.clj#L544)