[英]How do I call a Clojure function that takes a two-dimensional array of Strings from Java?
[英]How do I create a primitive two-dimensional (2d) array of doubles in Clojure?
我是Clojure interoping的Java API要求我传递一个2d的双精度数组; 双[][]。 如何在Clojure中创建一个原始的二维双数组? 我正在寻找这样的东西
(double-array-2d [[1 2] [3 4]])
此函数的Java返回类型为double [] []。
试试这个:
(into-array (map double-array [[1 2] [3 4]]))
试试这个:
(defn double-array-2d [coll]
(let [w (count coll)
h (apply max (map count coll))
arr (make-array Double/TYPE w h)]
(doseq [x (range w)
y (range h)]
(aset arr x y (double (get-in coll [x y]))))
arr))
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