(defparameter *str* (copy-seq "0123456789"))
→*STR*
(elt *str* 6)
→#\6
(setf (elt *str* 0) #\#)
→#\#
*str*
→"#123456789"
None.
None.
Should be prepared to signal an error of type type-error if sequence is not a proper sequence. Should signal an error of type type-error if index is not a valid sequence index for sequence.
aref may be used to access vector elements that are beyond the vector's fill pointer.
\issue{CONSTANT-MODIFICATION:DISALLOW}