Oh, and as you've probably noticed, } and { could be used here, also
(perhaps without using the rank conjunction, if the underlying verb
had a servicable rank).

Thanks,

-- 
Raul

On Thu, Jan 16, 2020 at 9:07 AM Raul Miller <rauldmil...@gmail.com> wrote:
>
> Certainly.
>
> But I would be inclined to swap left and right arguments on you (to
> follow the pattern we saw in Roger Hui's post).
>
> Some rather straightforward examples uses ^: or @.  as their core
> mechanism, and rank to spread the operation across the arguments.
>
> This could be done either explicitly or tacitly -- it's that
> straightforward -- though if you get into additional constraints that
> could change the playing field.
>
> Does this give you enough clues to see your way forward? Or are you
> wanting to see canned implementations? (Be aware that canned
> implementation get into questions which you've not yet addressed, like
> "what rank"?)
>
> Thanks,
>
> --
> Raul
>
> On Thu, Jan 16, 2020 at 3:44 AM Skip Cave <s...@caveconsulting.com> wrote:
> >
> > I'm thinking of something along the lines of # (copy)
> >
> > 1 1 1 0 1 0 0 1 0 1 # i.10
> >
> > 0 1 2 4 7 9
> >
> >
> > Only "apply" uses a boolean left argument to define which elements on the
> > right are affected by the verb:
> >
> >
> > 1 1 1 0 1 0 0 1 0 1 (apply -.) 1 1 1 1 1 1 1 1 1 1
> >
> > 0 0 0 1 0 1 1 0 1 0
> >
> > 1 1 1 0 1 0 0 1 0 1 (apply 2&+) 1 1 1 1 1 1 1 1 1 1
> >
> > 3 3 3 1 3 1 1 3 1 3
> >
> > 1 1 1 0 1 0 0 1 0 1 (apply 2&^~) i.10
> >
> > 0 1 4 3 16 5 6 49 8 81
> >
> > Is this possible?
> >
> > Skip Cave
> > Cave Consulting LLC
> >
> >
> > On Thu, Jan 16, 2020 at 2:08 AM Arnab Chakraborty <damd...@gmail.com> wrote:
> >
> > > My first idea was to use ^: . But I am unable to get a solution. None of
> > > the posted solutions use ^: either. Just wondering whether ^: can help
> > > here.
> > >
> > > On Thu, 16 Jan 2020, 12:36 'robert therriault' via Programming, <
> > > programm...@jsoftware.com> wrote:
> > >
> > > > It is too late, considering the result is not the one that you 
> > > > requested!
> > > >
> > > > Anyway I would use a numerical approach something like the incorrect one
> > > > that I just posted.
> > > >
> > > > Sheepishly - Cheers, bob
> > > >
> > > > > On Jan 15, 2020, at 23:03, 'robert therriault' via Programming <
> > > > programm...@jsoftware.com> wrote:
> > > > >
> > > > > Hi Skip,
> > > > >
> > > > > A late snowy night silly approach
> > > > >
> > > > >    ]a=.20#1
> > > > > 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
> > > > >   f1=. *@(3&|)@:i.@:#  NB. mod 3 non-zeros
> > > > >   f1 a
> > > > > 0 1 1 0 1 1 0 1 1 0 1 1 0 1 1 0 1 1 0 1
> > > > >   f2=. -.@*@(2&|)@:i.@:#  NB. mod 2 zeros
> > > > >   f2 a
> > > > > 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0
> > > > >   (f1 *: f2) a  NB. Not-And fork
> > > > > 1 1 0 1 0 1 1 1 0 1 0 1 1 1 0 1 0 1 1 1
> > > > >   f=. f1 *: f2  NB. requested result
> > > > >   f a
> > > > > 1 1 0 1 0 1 1 1 0 1 0 1 1 1 0 1 0 1 1 1
> > > > >
> > > > > Cheers, bob
> > > > >
> > > > >
> > > > >> On Jan 15, 2020, at 22:29, Skip Cave <s...@caveconsulting.com> wrote:
> > > > >>
> > > > >> ]a=.20#1
> > > > >
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