Re: Toggle a character between "T" and "F"

[Denis Bueno]

On 11 Mar 2005 10:10:44 -0800, Scott Waichler <scott.waichler@pnl.gov> wrote:
> I am looking for a way to toggle the character under the cursor.  When
> the character is "T", I'd like to hit a keystroke and change it to "F",
> and vice versa.  I use these characters to set logical values in R
> programming.  Can anyone tell me the lisp coded needed for this?

Possibly a kludge, but:

(defun toggle-t-r ()
  (interactive)
  (case (char-after)
    (?F (delete-char 1)
        (insert "T")
        (backward-char 1))
    (?T (delete-char 1)
        (insert "F")
        (backward-char 1))))


-- 
Denis Bueno
PGP: http://pgp.mit.edu:11371/pks/lookup?search=0xA1B51B4B&op=index