As in 1 2 3 4 (~.@:,) 3 4 5 6 NB. union u 1 2 3 4 5 6 ... or 1 2 3 4 ([,e.#]) 3 4 5 6 1 2 3 4 5 6
1 2 3 4 ([-.-.) 3 4 5 6 NB. intersection n 3 4 ... or 1 2 3 4 (e.#[) 3 4 5 6 3 4 ? APL has primitives for these of course! Mike Kip Murray wrote: > 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 > ------------------------------------------------------------------------ > > > No virus found in this incoming message. > Checked by AVG - www.avg.com > Version: 8.5.375 / Virus Database: 270.13.16/2240 - Release Date: 07/15/09 > 17:58:00 > > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
