Question

The function below should either insert a # if at beginning of the line, and if not, it should go to the end of line and insert a #. Why is this not working (it always goes to the end and inserts a #?

(defun end-of-line-hash () 
  (interactive)
   (if (beginning-of-line)
       (insert "#")  
     (end-of-line)
     (insert "#"))
)
(global-set-key (kbd "#") 'end-of-line-hash)

Answer 1

Function beginning-of-line moves the point to the beginning of the line. It probably returns nil. Try this instead.

(defun end-of-line-hash () 
  (interactive)
   (if (= (point) (line-beginning-position))
       (insert "#")  
     (end-of-line)
     (insert "#"))
)