Questions tagged [variable-watchers]

I have a problem with org-mode's agenda view. While I've set org-agenda-files to '("~/org/") invariably when I finally spin up M-x org-agenda I find that org-agenda-files just points to one org-file. Obviously something is deciding just to include…

I have added a watcher function to watch the last-command variable. (defun my-watch (symbol newval op where) (message "Hello")) (add-variable-watcher 'last-command #'my-watch) The function my-watch does not get invoked at all. How to watch for a…

So a function is called when the variable value is changed? add-hook seems to only accept functions.

I have variables foo and bar. I have a function that modifies foo and I can't change that function. How can I redirect the change made to foo so it applies to bar instead? EDIT : I want this redirection to track real time change. What I am trying to…