No proposed change to #. - further, the only change to #: would be to require the left argument be a vector IF one wants to match all current results.
Really just a scalar extension in the spirit of - 1 + i.3 > On 2018Jul 4, at 08:36, Skip Cave <[email protected]> wrote: > > I use #. quite a bit, to convert strings of digits to integers: > > Find all the three-digit integers that can be formed from the digits 2, 4, > & 6, with no duplication (permutations). > > 10#. 2 4 6 {~ (i.@! A.i.) 3 > > 246 264 426 462 624 642 > > > Woould this functionality stay the same? > > > Skip > > Skip Cave > Cave Consulting LLC > > > On Wed, Jul 4, 2018 at 10:23 AM David Lambert <[email protected]> wrote: > >> I agree with Joey Tuttle's idea. I can't think of any instances when >> I've wanted scalar x to be x| >> >> 8 (| -: #:)j./~i:20 >> 1 >> >> >> Furthermore j's antibase returns 1 quarter, a half dime, a nickel, and 3 >> pennies when asked to make change for 38 cents. My version gives 1 >> quarter, 1 dime, and 3 pennies. Last time I brought this up I met with >> general agreement that j's implementation is best, I still disagree. >> >> antibase =: [: :(|.@:}.@:((((| , <.@:%~) {.@:]) , }.@:])/)@:((,~ (1 , >> |.@:(*/\.)@:}.))~)"1 0) >> assert 1 1 0 3 -: 2 5r2 2 5 antibase 38 NB. change for 38 cents >> >> >> 2 5r2 2 5 #: 38 >> 1 1r2 1 3 >> >> >> On 07/04/2018 08:00 AM, [email protected] wrote: >>> Date: Tue, 3 Jul 2018 20:31:18 -0700 >>> From: Joey K Tuttle<[email protected]> >>> To:[email protected] >>> Subject: [Jprogramming] A possible change to behavior of #: >>> Message-ID:<[email protected]> >>> Content-Type: text/plain; charset=us-ascii >>> >>> Can anyone provide a reason it would be undesirable to have a scalar >> left (x) argument to #: behave any differently than x (#.^:_1) y ? >> >> ---------------------------------------------------------------------- >> For information about J forums see http://www.jsoftware.com/forums.htm > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
