Path: utzoo!attcan!uunet!samsung!zaphod.mps.ohio-state.edu!sdd.hp.com!hplabs!hpcc05!hpdmd48!rrr From: rrr@hpdmd48.boi.hp.com (Rudi Rynders) Newsgroups: comp.lang.apl Subject: Questions about J. Message-ID: <15160009@hpdmd48.boi.hp.com> Date: 8 Jan 91 22:57:42 GMT Organization: Hewlett Packard - Boise, ID Lines: 6 OK, how DOES one catenate two m-rowed arrays in the "horizontal" direction in J? A pretty basic question , I admit. But why is it so hard to find? Anyone care to explain in detail the "OVER" and "BY" constructs?. Rudi Rynders (rrr@ hpdmd48.boi.hp.com)