clojure.core/spit

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Type: function Added: Clojure 1.2 Examples: 6 Runnable: 1

([f content & options])

Opposite of slurp. Opens f with writer, writes content, then closes f. Options passed to clojure.java.io/writer.

Examples

by pkolloch on 2010-07-30 . May have evaluation errors. ▶

(spit "flubber.txt" "test") nil (slurp "flubber.txt") "test"

by megapatch on 2010-09-08 . May have evaluation errors. ▶

(spit "event.log" "test 1\n" :append true) nil (spit "event.log" "test 2\n" :append true) nil (println (slurp "event.log")) test 1 test 2 nil

by jafingerhut on 2012-04-19 ▶

(defn append-to-file "Uses spit to append to a file specified with its name as a string, or anything else that writer can take as an argument. s is the string to append." [file-name s] (spit file-name s :append true))

by ibercode on 2017-11-11 . May have evaluation errors. ▶

;;Create a record and save a log message to a log file ;;Constructor with side effects ;;define a Person record (defrecord Person [fname lname]) ;;define a function to save a log message into the log.txt using spit and :append (defn log-entry [msg] (spit "log.txt" (apply str msg "\n") :append true)) ;;build the constructor which: 1) log the message; 2)create a Person (defn make-person [fname lname] (log-entry (apply str "[log] New Person created : " lname "," fname)) (->Person fname lname)) ;;create a person (def person (make-person "John" "Smith")) ;;print the content of the log.txt to the console (println (slurp "log.txt"))

by messinm on 2018-12-02 . May have evaluation errors. ▶

; ClojureCLR doesn't use :append, use this instead (spit "hi.txt" "Test 1\n" :file-mode System.IO.FileMode/Append)

by Kaspazza on 2024-01-25 . May have evaluation errors. ▶

;; Spitting map, adds "," between key-value pairs (spit "hi.txt" {:a 1 :b 2}) ;; Now let's read it (slurp "hello.txt") ;; => "{:a 1, :b 2}"

Note by flyboarder

The only valid options for spit are :append and :encoding.

Note by didibus

Valid options include:

:append    true to open stream in append mode
:encoding  string name of encoding to use, e.g. \"UTF-8\".

See also

• clojure.core/slurp (2)
• clojure.java.io/writer (1)
• clojure.core/load-file (0)
• clojure.java.io/make-parents

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