description:
sselect[k1, k2] seq
select the k1'th to the k2'th elements from the given sequence
indices start from 1, not 0
final element has index -1, 2nd last element -2, and so on.
examples:
sselect[2,2] ssplit |abcdefgh>
|b>
sselect[2,3] (|a> + |b> . |c> + |d> . |e> . |f> + |g> + |h> . |i> + |j>)
|c> + |d> . |e>
sselect[4,7] ssplit[" "] |a b c d e f g h>
|d> . |e> . |f> . |g>
sselect[3,-3] ssplit[" "] |a b c d e f g h>
|c> . |d> . |e> . |f>
see also:
select