clojure.core/ref-history-count

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Type: function Added: Clojure 1.1 Examples: 2 Runnable: 0

([ref])

Returns the history count of a ref

Examples

by Claj on 2012-02-23 . May have evaluation errors. ▶

(def store (ref {})) #'user/store (ref-history-count store) 0 (ref-max-history store) 10 (ref-min-history store) 0

by tomdl89 on 2022-07-01 . May have evaluation errors. ▶

;; ref must have a :min-history of >0 to use the history queue (def r (ref 42 :min-history 2));; => #'user/r (ref-history-count r);; => 0 (dosync (alter r inc));; => 43 (ref-history-count r);; => 1 (dosync (alter r inc));; => 44 (ref-history-count r);; => 2

See also

• clojure.core/ref-min-history (0)
• clojure.core/ref-max-history
• clojure.core/ref (1)

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