Mac – How to Bind CMD+W to Kill Current Buffer in Emacs

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How do I bind CMD+W to kill the current buffer in Emacs on OSX? C-x k RET is unnatural and a comparatively lengthy binding compared to CMD+W.

Best Answer

(defun kill-current-buffer ()
  (interactive)
  (kill-buffer (current-buffer)))
(global-set-key (kbd "s-w") 'kill-current-buffer)

(Credit goes to jlf at #emacs)

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Mac – How to define new commands in emacs

(interactive) tells Emacs that the function is a command, i.e. that the function can be bound to a key and executed with M-x. So (defun select-all () (interactive) (mark-whole-buffer)) should work (but (defun select-all () (mark-whole-buffer)) won't). Did you restart Emacs or evaluate the definition with C-M-x (eval-defun)? What does C-h f select-all RET show? (The help buffer should begin with “select-all is an interactive”.)

Here, a simpler alternative is

(defalias 'select-all 'mark-whole-buffer)

Mac – Emacs – kill buffer without prompt

By default, Emacs doesn't ask you if you want to kill the buffer. It does ask you which buffer you want to kill.

If you don't want to be asked which buffer you want to kill, you can use this:

(global-set-key (kbd "C-x k") 'kill-this-buffer)

If you're being prompted for confirmation, then there's something in your .emacs (or the site specific initialziation). Try running emacs -q to check Emacs w/out your .emacs.

Note: Verified with Emacs 23.2.

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Mac – Emacs – kill buffer without prompt

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