On Sun, Jul 3, 2022 at 4:44 AM Elijah Stone <elro...@elronnd.net> wrote: > As far as I know, no apl used suffix rules for conformability. Two arrays of > like shape were conformable, and a scalar is conformable with anything; but no > two arrays are conformable aside from that. An early version of j did use > suffix conformability, and then switched.
APL used suffix indexing (of dimensions) for what I guess we might call its bracket indexing "rank operator" (the precursor to J's rank conjunction). -- Raul ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm