I think the problem is that the left-most +: is not-or and only accepts boolean arguments.
0 +:&+&+: 0 1 On Sun, Mar 2, 2014 at 7:53 AM, Pascal Jasmin <godspiral2...@yahoo.ca>wrote: > +:&+&+: 3 > 12 > 2 +&+&+: 3 > 10 > > > 2 +:&+&+: 3 > |domain error > | 2 +:&+&+:3 > > > The 3rd verb (leftmost) is called dyadically (with 0 element? like /?) > even though it sees only a monadic expression. > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm