eplace array expression with real value

js2-remap-array.el

(defun js2-remap-array ()
  "replace array expression with real value, eg. arr[1] into 123"
  (interactive)
  (let*
      (
       (node (js2-node-at-point))
       (current-start (js2-node-abs-pos node))
       (current-pos current-start)
       (offset 0)
       (elems (js2-array-to-list node))
       (pattern (concat (js2-name-node-name node) "\\[\\(\[0-9\]+\\)\\]"))
       )
    (save-excursion
      (mapc (lambda (x)
              (when (not (= x current-start))
                (if (> x current-pos)
                    (goto-char (+ offset x))
                    (goto-char x))                
                (setq current-pos (point))
                (when (search-forward-regexp pattern nil t)
                  (let* ((content (match-string-no-properties 0))
                         (index (string-to-number (match-string-no-properties 1)))
                         (replacement (nth index elems))
                         )
                    (goto-char current-pos)
                    (setq offset (- (length content) (length replacement)))
                    (delete-region current-pos
                                   (+ current-pos (length content)))
;                    (print `(,index  ,replacement ,content))
                    (insert replacement)))))
            (js2r--local-var-positions node)))))