lispdoc - results for assert

(assert test-form &optional places datum &rest arguments)
Function: Signals an error if the value of test-form is nil. Continuing from this error using the CONTINUE restart will allow the user to alter the value of some locations known to SETF, starting over with test-form. Returns NIL.
(defun sqr (x)
  "Multiply x by itself."
  (assert (numberp x))
  (* x x))
Mentioned in:
CLtL2 - 24.1. General Error-Signaling Functions
CLtL2 - 24.2. Specialized Error-Signaling Forms and Macros
CLtL2 - 29.3.3. Handling Conditions
CLtL2 - 29.4.1. Signaling Conditions
CLtL2 - 29.4.2. Assertions
CLtL2 - 7.2. Generalized Variables
HyperSpec - Macro ASSERT
Successful Lisp - assert
Successful Lisp - chapter30
Successful Lisp - condition designator
(chunga:assert-char stream expected-char)
Function: Reads the next character from STREAM and checks if it is the character EXPECTED-CHAR. Signals an error otherwise.
(sort sequence predicate &rest args &key key)
Function: Destructively sort SEQUENCE. PREDICATE should return non-NIL if ARG1 is to precede ARG2.
(defun sorted-rows (rows schema order-by)
  (sort (copy-seq rows)
        (row-comparator order-by schema)))
Mentioned in:
CLtL2 - 14.5. Sorting and Merging
HyperSpec - Function SORT, STABLE-SORT
On Lisp - Chapter _28
On Lisp - Lazy Evaluation
On Lisp - New Utilities (Computation at Compile-Time)
PCL - anonymous functions
PCL - combining recycling with shared structure
PCL - other structures
PCL - sorting and merging
Successful Lisp - chapter13
Successful Lisp - closures