make-array

function/macro

since v0.0-1211

clojure.core/make-array

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Details:

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See Also:

• aclone
• array

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Source docstring:

Construct a JavaScript array of the specified dimensions. Accepts ignored
type argument for compatibility with Clojure. Note that there is no efficient
way to allocate multi-dimensional arrays in JavaScript; as such, this function
will run in polynomial time when called with 3 or more arguments.

(defn ^array make-array
  ([size]
     (js/Array. size))
  ([type size]
     (make-array size))
  ([type size & more-sizes]
    (let [dims more-sizes
          dimarray (make-array size)]
      (dotimes [i (alength dimarray)]
        (aset dimarray i (apply make-array nil dims)))
      dimarray)))

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(core/defmacro make-array
  ([size]
   (vary-meta
     (if (core/number? size)
       `(array ~@(take size (repeat nil)))
       `(js/Array. ~size))
     assoc :tag 'array))
  ([type size]
   `(cljs.core/make-array ~size))
  ([type size & more-sizes]
   (vary-meta
     `(let [dims#     (list ~@more-sizes)
            dimarray# (cljs.core/make-array ~size)]
        (dotimes [i# (alength dimarray#)]
          (aset dimarray# i# (apply cljs.core/make-array nil dims#)))
        dimarray#)
     assoc :tag 'array)))

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