Function: cl-nset-difference

cl-nset-difference is an autoloaded and byte-compiled function defined in cl-seq.el.gz.

Signature

(cl-nset-difference LIST1 LIST2 [KEYWORD VALUE]...)

Documentation

Combine LIST1 and LIST2 using a set-difference operation.

The resulting list contains all items that appear in LIST1 but not LIST2. This is a destructive function; it reuses the storage of LIST1 (but not LIST2) whenever possible.

Keywords supported: :test :test-not :key

View in manual

Aliases

nset-difference (obsolete since 27.1)

Source Code

;; Defined in /usr/src/emacs/lisp/emacs-lisp/cl-seq.el.gz
;;;###autoload
(defun cl-nset-difference (list1 list2 &rest cl-keys)
  "Combine LIST1 and LIST2 using a set-difference operation.
The resulting list contains all items that appear in LIST1 but not LIST2.
This is a destructive function; it reuses the storage of LIST1 (but not
LIST2) whenever possible.
\nKeywords supported:  :test :test-not :key
\n(fn LIST1 LIST2 [KEYWORD VALUE]...)"
  (declare (important-return-value t))
  (if (or (null list1) (null list2)) list1
    (apply #'cl-set-difference list1 list2 cl-keys)))