Awesome thanks Henry! Especially the #\ On Fri, 25 Oct 2019, 22:19 Henry Rich, <henryhr...@gmail.com> wrote:
> Some fine points of interpreter use: > > >:@i.@# > > is the same as > > #\ > > which still makes me giggle. And #\ is backed by special code so it's > faster too. > > > (;@:(<@(<\))~ >:@i.@#) 'abcdefg' > > engages the special code for ;@:(<@f)) which avoids boxing overhead and > speeds up ; . All the parentheses are necessary for the fast form to be > recognized. > > Henry Rich > > On 10/24/2019 10:49 PM, Ric Sherlock wrote: > > Tacit versions of my original > > > > > > ;@(>:@i.@# <@(<\) ]) 'abcdefg' > > > > > > or if you like hooks: > > > > ;@(<@(<\)~ >:@i.@#) 'abcdefg' > > > > > > > > On Fri, Oct 25, 2019 at 10:16 AM 'robert therriault' via Programming < > > programm...@jsoftware.com> wrote: > > > >> Hey Skip, > >> > >> My tacit equivalents, although not exactly equivalent since the tacit > can > >> be extended to longer strings. > >> > >> a#~-.(<'')=a=.,(>:i.5)<\'abcde' NB. Skip's version > >> ┌─┬─┬─┬─┬─┬──┬──┬──┬──┬───┬───┬───┬────┬────┬─────┐ > >> │a│b│c│d│e│ab│bc│cd│de│abc│bcd│cde│abcd│bcde│abcde│ > >> └─┴─┴─┴─┴─┴──┴──┴──┴──┴───┴───┴───┴────┴────┴─────┘ > >> ((<'') -.~ ])@:(,@:((1+i.@:#)<\ ]))'abcde' NB. tacit version > >> ┌─┬─┬─┬─┬─┬──┬──┬──┬──┬───┬───┬───┬────┬────┬─────┐ > >> │a│b│c│d│e│ab│bc│cd│de│abc│bcd│cde│abcd│bcde│abcde│ > >> └─┴─┴─┴─┴─┴──┴──┴──┴──┴───┴───┴───┴────┴────┴─────┘ > >> ((<'') -.~ ])@:(,@:((1+i.@:#)<\ ]))'abcdef' NB. six character > string > >> example > >> > >> > ┌─┬─┬─┬─┬─┬─┬──┬──┬──┬──┬──┬───┬───┬───┬───┬────┬────┬────┬─────┬─────┬──────┐ > >> > >> > │a│b│c│d│e│f│ab│bc│cd│de│ef│abc│bcd│cde│def│abcd│bcde│cdef│abcde│bcdef│abcdef│ > >> > >> > └─┴─┴─┴─┴─┴─┴──┴──┴──┴──┴──┴───┴───┴───┴───┴────┴────┴────┴─────┴─────┴──────┘ > >> a: -.~ ,(>:i.5)<\'abcde' NB. Ric's version > >> ┌─┬─┬─┬─┬─┬──┬──┬──┬──┬───┬───┬───┬────┬────┬─────┐ > >> │a│b│c│d│e│ab│bc│cd│de│abc│bcd│cde│abcd│bcde│abcde│ > >> └─┴─┴─┴─┴─┴──┴──┴──┴──┴───┴───┴───┴────┴────┴─────┘ > >> (a: -.~ ,@:((>:@:i.@:#) <\ ]))'abcde' NB. tacit version > >> ┌─┬─┬─┬─┬─┬──┬──┬──┬──┬───┬───┬───┬────┬────┬─────┐ > >> │a│b│c│d│e│ab│bc│cd│de│abc│bcd│cde│abcd│bcde│abcde│ > >> └─┴─┴─┴─┴─┴──┴──┴──┴──┴───┴───┴───┴────┴────┴─────┘ > >> (a: -.~ ,@:((>:@:i.@:#) <\ ]))'abcdef' NB. six character string > example > >> > >> > ┌─┬─┬─┬─┬─┬─┬──┬──┬──┬──┬──┬───┬───┬───┬───┬────┬────┬────┬─────┬─────┬──────┐ > >> > >> > │a│b│c│d│e│f│ab│bc│cd│de│ef│abc│bcd│cde│def│abcd│bcde│cdef│abcde│bcdef│abcdef│ > >> > >> > └─┴─┴─┴─┴─┴─┴──┴──┴──┴──┴──┴───┴───┴───┴───┴────┴────┴────┴─────┴─────┴──────┘ > >> > >> Cheers, bob > >> > >> > >>> On Oct 24, 2019, at 12:59 PM, Skip Cave <s...@caveconsulting.com> > wrote: > >>> > >>> I'm sure this can be reduced by J experts in implicit coding. > >> ---------------------------------------------------------------------- > >> For information about J forums see http://www.jsoftware.com/forums.htm > >> > > ---------------------------------------------------------------------- > > For information about J forums see http://www.jsoftware.com/forums.htm > > > -- > This email has been checked for viruses by AVG. > https://www.avg.com > > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
