1 USING: kernel sequences sequences.private math ;
6 : iterate-seq [ dup length swap ] dip ; inline
8 : (map-next) ( i seq quot -- )
9 ! this uses O(n) more bounds checks than is really necessary
10 [ [ [ 1+ ] dip ?nth ] 2keep nth-unsafe ] dip call ; inline
14 : each-next ( seq quot: ( next-elt elt -- ) -- )
15 iterate-seq [ (map-next) ] 2curry each-integer ; inline
17 : map-next ( seq quot: ( next-elt elt -- newelt ) -- newseq )
18 over dup length swap new-sequence [
19 iterate-seq [ (map-next) ] 2curry
20 ] dip [ collect ] keep ; inline