Unset key binding in emacs

Question

For example, in the codes of zen-coding, the \"C-j\" shadows the normal behavior of \"C-j\" (newline-and-indent)

(define-key zencoding-mode-keym         


        

Answer 1

The general way to unbind a key (for any keymap) is to define a binding of nil:

(define-key KEYMAP KEY nil)

For convenience, there are also two standard functions for unbinding from the global keymap and from the local keymap (which is usually the major mode's keymap).

• (global-unset-key KEY)
• (local-unset-key KEY)

Those ones are interactive commands, as per their respective complements global-set-key and local-set-key.

As to your specific example, you probably want something like this:

(eval-after-load "zencoding-mode"
  '(define-key zencoding-mode-keymap (kbd "C-j") nil))