Function: gnus-sorted-union

gnus-sorted-union is an autoloaded and byte-compiled function defined in gnus-range.el.gz.

Signature

(gnus-sorted-union LIST1 LIST2)

Documentation

Return union of LIST1 and LIST2.

LIST1 and LIST2 have to be sorted over <.

Source Code

;; Defined in /usr/src/emacs/lisp/gnus/gnus-range.el.gz
;;;###autoload
(defun gnus-sorted-union (list1 list2)
  "Return union of LIST1 and LIST2.
LIST1 and LIST2 have to be sorted over <."
  (let (out)
    (while (and list1 list2)
      (cond ((= (car list1) (car list2))
	     (setq out (cons (car list1) out)
		   list1 (cdr list1)
		   list2 (cdr list2)))
	    ((< (car list1) (car list2))
	     (setq out (cons (car list1) out)
		   list1 (cdr list1)))
	    (t
	     (setq out (cons (car list2) out)
		   list2 (cdr list2)))))
    (while list1
      (setq out (cons (car list1) out)
	    list1 (cdr list1)))
    (while list2
      (setq out (cons (car list2) out)
	    list2 (cdr list2)))
    (nreverse out)))