store/[org.clojure/clojure "1.8.0"] clj::clojure.core/alength

Official Documentation

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Arities
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   [array]

Docstring
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  Returns the length of the Java array. Works on arrays of all
  types.

Source

(defn alength
  "Returns the length of the Java array. Works on arrays of all
  types."
  {:inline (fn [a] `(. clojure.lang.RT (alength ~a)))
   :added "1.0"}
  [array] (. clojure.lang.RT (alength array)))

Example 1

Edit
(def my-array (into-array Integer/TYPE [1 2 3]))
;; => #'user/my-array

(alength my-array)
;; => 3

Uses on crossclj