+:&+&+: 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
