share/descriptive/descriptive_util.lisp

   1 ;; descriptive.lisp -- additional functions needed by package descriptive
   2
   3 (defun $unique_in_sorted_array (a)
   4   (let ((prev (gensym)))
   5     (cons '(mlist) (loop for x across a when (not (alike1 prev (setq prev x))) collect x))))
   6
   7 (defun $vector_min_max (a)
   8   (if (> (length a) 0)
   9     (let ((min-a '$inf) (max-a '$minf))
  10       (loop for x across a
  11             do (let ((cmp-min ($compare x min-a))
  12                      (cmp-max ($compare x max-a)))
  13                  (when (string= cmp-min "<") (setq min-a x))
  14                  (when (string= cmp-max ">") (setq max-a x))))
  15       (list '(mlist) min-a max-a))))
  16   ;; Otherwise return NIL if A is empty.