access the elements of a 1-dimensional array
Major Section:  ARRAYS

Example Form:
(aref1 'delta1 a (+ i k))

General Form: (aref1 name alist index)

where name is a symbol, alist is a 1-dimensional array and index is a legal index into alist. This function returns the value associated with index 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, aref1 must do a linear search through alist. In that case the correct answer is returned but a slow array comment is printed to the comment window. See slow-array-warning.