Thanks Raul and Marin for the historical reference. Martin, your paper is very enlightening! I really like all the diagrams you have in the paper. Thanks for sharing. Cordially, Vijay.
On Fri, Nov 2, 2018 at 7:01 PM <[email protected]> wrote: > Raul Miller wrote: > > It looks like perhaps originally the meanings of @ and @: were > > reversed? Or maybe @: was an afterthought after @ was redefined? > > > Early J (1989/90) just had @ At and & Compose. (The symbols @: and > &: were in use for unrelated things at that time: Anagram and Fit.) > > */ @ ! 3 6 5 > 518400 > > worked because ! Factorial/OutOf had ranks _ 0 0 at that time. > Likewise all other classical "Scalar Functions". > > J Version 3.2, 1991 06 02, introduced @: Atop and &: Appose as > new conjunctions. (And relocated Anagram/Fit to A./!.) > > I argued for changing the scalar ranks in my APL'95 paper > http://juggle.gaertner.de/bnp/knot.ps > and this didn't fall on deaf ears: > > Changes in Release 3.03, 1996 12 13: > + etc. ranks of monads changed from _ to 0 > > > Martin Neitzel > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
