Wrong number of arguments when binding key

Question

Hi I am trying to define an interactive menu when using 'm' in neotree to give me similar options to what I used in Nerdtree.

I binded this key:

  (evil-define-key
    'normal neotree-mode-map
... More keybindings ...
    (kbd "m") 'neotree-modify-mode-menu)

and my function is:

(defun neotree-modify-mode-menu (option)
  "Asks for a mode and execute associated Neotree command"
  (interactive "c(a)dd node | (d)elete node | (r)ename node")
  (cond
    ((eq option ?a) (neotree-create-node))
    ((eq option ?d) (neotree-delete-node))
    ((eq option ?c) (neotree-copy-node))
    ((eq option ?r) (neotree-rename-node))
    (:else (message (format "Invalid option %c" option)))))

it works for every option but not create-node. The reason is because create-node takes one argument as I can see here: https://github.com/jaypei/emacs-neotree/blob/dev/neotree.el#L1921 and the rest take no arguments.

So I get this error when calling the function from the keybinding:

Wrong number of arguments: #[(filename) "Å2w^@Æ^X GÇU\203^R^@ÈÅÆ\"\210  ÉÆOÊ\232?^PË  !\203*^@ÌÍ  \"\210ÈÅÆ\"\210^H\203[^@                                                                     
ÎÏ  \"!\203[^@Ð ÇÑÒ ÓÔ$TOÔ\"\210ÕÖÆ #\210×  !\210ØÆ!\210^K\203[^@Ù  !\210^H?\205u^@^LÎÚ \"!\205u^@Ð Ô\"\210×  !\210ØÆ!)0\207" [is-file filename neo-confirm-create-file neo-create-file-auto-o\
pen neo-confirm-create-directory rlt nil 0 throw -1 ...] 8 ("/home/panavtec/.emacs.d/elpa/neotree-20170522.758/neotree.elc" . 64641) (let* ((current-dir (neo-buffer--get-filename-current-lin\
e neo-buffer--start-node)) (current-dir (neo-path--match-path-directory current-dir)) (filename (read-file-name "Filename:" current-dir))) (if (file-directory-p filename) (setq filename (con\
cat filename "/"))) (list filename))], 0

If i bind the key to neotree-create-node function it works:

  (evil-define-key normal neotree-mode-map
    (kbd "m") 'neotree-create-node)

How I can fix it?

Drew Drew · Accepted Answer · 2017-09-21T01:07:42

Clearly you need to provide an argument for create node. What argument do you want to provide it? How do you expect to get that argument?

If you always want to use the same argument value then just hard-code it in your call to neotree-create-node.

Otherwise, have your interactive spec read it.

Your interactive spec is anyway wrong - see the Elisp manual, node Using Interactive.

Wrong number of arguments when binding key

2 Answers