1 ! Copyright (C) 2008 Slava Pestov.
2 ! See http://factorcode.org/license.txt for BSD license.
3 USING: kernel sequences sequences.private arrays vectors fry
7 : flattener ( seq quot -- seq vector quot' )
13 [ _ push-all ] [ _ push ] if
18 : flattening ( seq quot combinator -- seq' )
19 [ flattener ] dip dip { } like ; inline
21 : map-flat ( seq quot -- seq' ) [ each ] flattening ; inline
23 : 2map-flat ( seq quot -- seq' ) [ 2each ] flattening ; inline
25 : (3each) ( seq1 seq2 seq3 quot -- n quot' )
26 [ [ [ length ] tri@ min min ] 3keep ] dip
27 '[ [ _ nth-unsafe ] [ _ nth-unsafe ] [ _ nth-unsafe ] tri @ ] ; inline
29 : 3each ( seq1 seq2 seq3 quot -- seq ) (3each) each ; inline
31 : 3map ( seq1 seq2 seq3 quot -- seq ) (3each) map ; inline