RANGE-FILTER
[GENERIC-FUNCTION]
OM 6.1
Function Reference
| - list | a list | [default = (1 2 3 4 5)] | |
| - posn | position bounds | [default = ((0 1) (3 4))] | |
| - mode | pass or reject | [default = reject] | |
Description:
Select elements in <list> whose positions (couting from 0) in the list are defined by <posn>
<posn> is a list of pairs (min-pos max-pos) in increasing order with no everlap.
<mode> 'reject' means reject the selected elements.
<mode> 'pass' means retain only the selected elements.
Ex. (range-filter '(10 11 12 13 14 15 16) '((0 1) (3 4)) 'pass) => (10 11 13 14)
Ex. (range-filter '(10 11 12 13 14 15 16) '((0 1) (3 4)) 'reject) => (12 13)