After some thought, I am in favor of this version (I think first proposed by Henry):
((* * <&0) ,. #:) i:3 _1 0 1 _1 1 0 _1 1 1 0 0 0 0 0 1 0 1 0 0 1 1 #. ((* * <&0) ,. #:) i:3 _3 _2 _1 0 1 2 3 Note also: 2 | ((* * >&0) ,. #:) i:3 0 0 1 0 1 0 0 1 1 0 0 0 1 0 1 1 1 0 1 1 1 That said this could be further "improved" by making the #: result follow the p. result pattern (least significant bit first): (|.@#: ,. * * <&0) i:3 1 1 _1 1 0 _1 0 1 _1 0 0 0 1 1 0 1 0 0 0 1 0 (|.@#: , * * <&0)"0 i:3 1 0 _1 0 1 _1 1 _1 0 0 0 0 1 0 0 0 1 0 1 1 0 #.@|. :(#. |.)"1 (|.@#: ,. * * <&0) i:3 _1 _3 _2 0 3 1 2 #.@|. :(#. |.)"1 (|.@#: , * * <&0)"0 i:3 _3 _2 _1 0 1 2 3 2 p.~ (|.@#: , * * <&0)"0 i:3 _3 _2 _1 0 1 2 3 -- Raul ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
