The vocabulary says: x;y is (<x),y if y is boxed, and(<x),<y if y is open.
Apparently (2;3 4) is considered boxed, so the < must be explicite. (1;1 2);<2;3 4 ┌───────┬───────┐ │┌─┬───┐│┌─┬───┐│ ││1│1 2│││2│3 4││ │└─┴───┘│└─┴───┘│ └───────┴───────┘ (<(<1),<1 2),<(<2),<3 4 ┌───────┬───────┐ │┌─┬───┐│┌─┬───┐│ ││1│1 2│││2│3 4││ │└─┴───┘│└─┴───┘│ └───────┴───────┘ >________________________________ > Fra: Steven Taylor <tayl...@gmail.com> >Til: Programming forum <programming@jsoftware.com> >Sendt: 7:48 torsdag den 24. maj 2012 >Emne: [Jprogramming] boxed + indexing > >it's always puzzled me why it is necessary to box the last item in order to >make the structure at index 1 the same as that at 0 > >((1;(1 2)));<(2;(3 4)) > >Is this by design? > >thanks, >-Steven >---------------------------------------------------------------------- >For information about J forums see http://www.jsoftware.com/forums.htm > > > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
