clojure - Clojure 中的自省(introspection)

Question

在 Clojure 中进行自省(introspection)的最佳方法是什么？有没有类似 Python 的 dir功能？我对查找与我交互操作的 java 类上可用的方法特别感兴趣，但我也有兴趣找出 Clojure 中与自省(introspection)相关的任何可用方法。

Answer 1

Michiel Borkent 和 Dave Ray 涵盖了互操作选项。

为了发现 Clojure 函数，clojure.repl 中有几个选项。命名空间(默认情况下可能已经引用到您的 REPL 中)。

dir :

=> (require 'clojure.set)
nil
=> (dir clojure.set)
difference
index
intersection
join
map-invert
project
rename
rename-keys
select
subset?
superset?
union

apropos :

=> (apropos #"^re-")
(re-pattern re-matches re-matcher re-groups re-find re-seq)

find-doc :

=> (find-doc #"^re-")
-------------------------
clojure.core/re-find
([m] [re s])
  Returns the next regex match, if any, of string to pattern, using
  java.util.regex.Matcher.find().  Uses re-groups to return the
  groups.
-------------------------
clojure.core/re-groups
([m])
  Returns the groups from the most recent match/find. If there are no
  nested groups, returns a string of the entire match. If there are
  nested groups, returns a vector of the groups, the first element
  being the entire match.
-------------------------
....