I wrote: > N=: (^&)(+&|/&.:) This is probably a better approach:
N=: (^&)(+/@:|&.) 1 N 3 _4 12 19 2 N 3 _4 12 13 The big advantage is that | is applied to the entire array, instead of to items. Also, I realized that &. works fine. That said, it would be nice if J treated ] as the obverse of the | monad. -- Raul ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
