Some years ago I defined them as u =: [: ~. , n =: (# @:[ > i.)#] Regards, Markus
Kip Murray schrieb: > The following is easy but interesting. > > A "set" is a numeric vector without repetitions. Provide definitions for the > union u and intersection n of two sets: > > 1 2 3 4 u 3 4 5 6 NB. elements of one or the other > 1 2 3 4 5 6 > > 1 2 3 4 n 3 4 5 6 NB. common elements > 3 4 > > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm > > > > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
