如何在clojure中获得'doc'函数的输出？

我试图保存

doc

函数的输出，例如：

user> (def doc-str-split (doc str/split))
-------------------------
clojure.string/split
([s re] [s re limit])
  Splits string on a regular expression.  Optional argument limit is
  the maximum number of splits. Not lazy. Returns vector of the splits.
#'user/doc-str-split

user> doc-str-split
nil
user> 

但是，对于

docstr拆分

，我得到了

nil

。我试图获取

文档

输出的

类型

：

user> (type (doc str/split))
-------------------------
clojure.string/split
([s re] [s re limit])
  Splits string on a regular expression.  Optional argument limit is
  the maximum number of splits. Not lazy. Returns vector of the splits.
nil

仍然得到一个

nil

。如何保存

doc

函数的输出？

您可以使用来捕获输出，如下所示：

user> (def doc-str-split (with-out-str (doc str/split)))
#'user/doc-str-split

user> (println doc-str-split)
-------------------------
clojure.string/split
([s re] [s re limit])
  Splits string on a regular expression.  Optional argument limit is
  the maximum number of splits. Not lazy. Returns vector of the splits.

nil

user> (type (with-out-str (doc str/split)))
java.lang.String

---

您可以只获取文档字符串，如下所示：

user.core=> (def doc (prn (:doc (meta #'clojure.string/split))))
"Splits string on a regular expression.  Optional argument limit is  
 the maximum number of splits. Not lazy. Returns vector of the splits."

---

啊，我不知道这个功能。谢谢

Clojure

充满了令人惊讶但有用的功能。非常感谢。