SUBS-POSN
[GENERIC-FUNCTION]
OM 6.1
Function Reference
| - lis1 | a list | [default = (0 1 2 3)] | |
| - posn | a list of indices | [default = (1 3)] | |
| - val | a list | [default = (a b)] | |
Description:
Substitutes the elements of <lis1> at position(s) <posn> (if they exist) with the corresponding elements in <val>.
Ex. (subs-posn '(0 1 2 3) 2 'a) => (0 1 a 3)
Ex. (subs-posn '(0 1 2 3) '(1 3) '(a b)) => (0 a 2 b)