dope program

[Emanuel Berg via Users list for the GNU Emacs text editor <help-gnu-emacs@gnu.org>]

(defun dope (boxes pills dose &optional from)
  (interactive "nboxes: \nnpills/box: \nndose/day: ")
  (let*((days     (/ (* boxes pills) dose))
        (done     (time-add (when from
                              (date-to-time (concat from "T00:00+01:00")) )
                            (days-to-time (1- days)) ))
        (done-str (format-time-string "%F" done))
        (get-more (format-time-string "%F"
                                      (time-add done (days-to-time -10))) ))
    (insert (format "%s  [%s]   %s" ; don't change
                    (or from (format-time-string "%F")) get-more done-str) )))

Very useful, and seems to work, just put the output data in
a text file.

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