lispdoc - results for complement

(complement function)
Function: Return a new function that returns T whenever FUNCTION returns NIL and NIL whenever FUNCTION returns non-NIL.
Example:
(defun next-instr (code)
  (find-if (complement #'label-p) code))
Mentioned in:
CLtL2 - 14. Sequences
HyperSpec - Function COMPLEMENT
On Lisp - Common Lisp Evolves
On Lisp - Composing Functions
On Lisp - When Capture Occurs
PCL - hash table iteration