clojure.core/print-dup

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Type: var Added: Clojure unknown Examples: 2 Runnable: 1

()

Examples

by cdorrat on 2011-03-14 ▶

;; print-dup can be used for basic serialization ;; the following methods write/read clojure forms to/from a file (defn to-file "Save a clojure form to a file" [#^java.io.File file form] (with-open [w (java.io.FileWriter. file)] (print-dup form w))) (defn from-file "Load a clojure form from file." [#^java.io.File file] (with-open [r (java.io.PushbackReader. (java.io.FileReader. file))] (read r)))

by cdorrat on 2011-03-14 . May have evaluation errors. ▶

;; print-dup is a multimethod, you can extend it to support new types. ;; The following statement adds print-dup support to ;; the java.util.Date class (defmethod print-dup java.util.Date [o w] (print-ctor o (fn [o w] (print-dup (.getTime o) w)) w))

Note by TimMc

This is a multimethod that can be implemented to define the printing of various values when *print-dup* is bound to true.

See also

• clojure.core/print-ctor
• clojure.core/print-method (0)

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