Yes it is. The example looks strange because the first character of a is "a", not normally used as a separator. If the first character is a blank (say), then it looks more normal. e.g.
state=: 3 2 2$ 1 1 2 1 2 0 2 2 1 0 2 2 a=: ' a good way to start the day' (0;state;<a.={.a);:a;:a ┌──┬─────┬────┬───┬──────┬────┬────┐ │ a│ good│ way│ to│ start│ the│ day│ └──┴─────┴────┴───┴──────┴────┴────┘ <;.1 a ┌──┬─────┬────┬───┬──────┬────┬────┐ │ a│ good│ way│ to│ start│ the│ day│ └──┴─────┴────┴───┴──────┴────┴────┘ S=: 0;state;<a.={.a (S&;: -: <;.1) a 1 (S&;: -: <;.1) ' the quick brown fox jumps over the lazy dog' 1 x=: 1e6$' the quick brown fox jumps over the lazy dog' (S&;: -: <;.1) x 1 Now the thing that surprised me when I saw it the first time: timer=: 6!:2 10 timer '<;.1 x' 0.0630174 10 timer 'S&;: x' 0.0675069 <;.1 is implemented using hand-coded C. 2012/3/8 Linda Alvord <lindaalv...@verizon.net> > Roger, I'm not sure that this is what you had in mind. > > > a=:'a good way to start the day' > <;.1 a > ---------T--------T---------T--┐ > │a good w│ay to st│art the d│ay│ > L--------+--------+---------+--- > state=: 3 2 2$ 1 1 2 1 2 0 2 2 1 0 2 2 > (0;state;<a.={.a);:a > ---------T--------T---------T--┐ > │a good w│ay to st│art the d│ay│ > L--------+--------+---------+--- > > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm