Python “dir” equivalent in Clojure

后端 未结 2 2012
囚心锁ツ
囚心锁ツ 2021-02-05 13:12

Does anybody know if there is a Clojure equivalent for Pythons \"dir\". Basically I need to know the functions I can call on something or more specifically for java objects I wa

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  • 2021-02-05 14:00

    The clojure.repl namespace (which is available since Clojure 1.2) contains the macro dir and the function dir-fn:

    user=> (clojure.repl/dir clojure.main)   
    load-script
    main
    repl
    ...
    
    user=> (clojure.repl/dir-fn 'clojure.main)
    (load-script main repl repl-caught repl-exception 
     repl-prompt repl-read skip-if-eol skip-whitespace 
     with-bindings)
    
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  • 2021-02-05 14:01

    clojure.contrib.repl-utils/show for use at the REPL:

    user=> (use '[clojure.contrib.repl-utils :only (show)])
    nil
    user=> (show String)
    ===  public final java.lang.String  ===
    [ 0] static CASE_INSENSITIVE_ORDER : Comparator
    [ 1] static copyValueOf : String (char[])
    [ 2] static copyValueOf : String (char[],int,int)
    [ 3] static format : String (Locale,String,Object[])
    [ 4] static format : String (String,Object[])
    ...
    

    Alternatively, maybe something like:

    user=> (map #(.getName %) (.getMethods String))
    ("equals" "toString" "hashCode" "compareTo" ...)
    

    .getFields, and .getConstructors accordingly.

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