Major Section: ARRAYS
Example Form: (aref2 'delta1 a i j) General Form: (aref2 name alist i j)where
nameis a symbol,
alistis a 2-dimensional array and
jare legal indices into
alist. This function returns the value associated with
(i . j)in
alist, or else the default value of the array. See arrays for details.
This function executes in virtually constant time if
alist is in
fact the ``semantic value'' associated with
name (see arrays).
When it is not,
aref2 must do a linear search through
that case the correct answer is returned but a slow array comment is
printed to the comment window. See slow-array-warning.