lispdoc - results for delete-if-not

(delete-if-not predicate sequence &rest args &key from-end (start 0) (end nil)
 (key nil) (count nil))
Function: Return a sequence formed by destructively removing the elements not satisfying the specified PREDICATE from the given SEQUENCE.
 Mentioned in:
HyperSpec - Function REMOVE, REMOVE-IF, REMOVE-IF-NOT, DELETE, DELETE-IF, DELETE-IF-NOT
PCL - destructive operations
Successful Lisp - chapter12
-if-not
 
 Mentioned in:
PCL - higher order function variants