What about

c=: 1 : ',/ y u/. ~i.# y'
   *:`-:`^ c 3 2 1 0 3 2 1
9 1 2.7182818 0 1.5 7.3890561 1

It is one of the repeating questions in this forum and IIRC this solution was 
provided by Dan Bron (pity he is less active on this forum then he used to be).


R.E. Boss


> -----Oorspronkelijk bericht-----
> Van: Programming <[email protected]>
> Namens Piet de Jong
> Verzonden: vrijdag 3 mei 2019 11:20
> Aan: Programming forum <[email protected]>
> Onderwerp: Re: [Jprogramming] Applying different verbs to different items.
> 
> Thanks for pointing the problem with repeated items.
> 
>  “respectively” (I looked at the code) appears to be  a long complicated
> explicitly defined conjunction.   I was hoping for something succinct and
> elegant that I could add to my bag of tricks (and understanding).
> 
> > On 3 May 2019, at 7:04 pm, Ric Sherlock <[email protected]> wrote:
> >
> > I think /.~ works fine until there are repeated items. So
> >   g=: *:`-:`^
> >   c=: /.~
> >   g c 3 1 0 3   NB. probably not the desired result
> >  9 9
> >
> > 0.5 0
> >
> > 1 0
> >
> >
> > Using respectively works ok and also allows for dyadic verb use in the
> > gerund.
> >
> > c2=: respectively ]
> >
> > g c2 3 1 0 3
> >
> > 9 0.5 1 9
> >
> > g c2 i. 3 4
> >
> > 0 1 4 9
> >
> > 2 2.5 3 3.5
> >
> > 2980.96 8103.08 22026.5 59874.1
> >
> >
> >
> >
> > On Fri, May 3, 2019 at 8:16 PM Piet de Jong <[email protected]> wrote:
> >
> >> Following all the suggestions, the following seems to get close
> >>   g=. *: ` -: `^
> >>   c=. /.~
> >>
> >> g c i.3 4
> >> 0 2 4 6
> >>
> >> 2 2.5 3 3.5
> >>
> >> 16 18 20 22
> >>
> >>   $ g c i.3 4
> >> 3 1 4
> >>
> >> The only annoying thing are the final dimensions, fixed up with ,”2
> >>
> >>> On 3 May 2019, at 5:04 pm, Piet de Jong <[email protected]> wrote:
> >>>
> >>> c=:((128!:2)&.><)”0
> >>>
> >>> seems to work great.   Will have to work out exactly why it works —
> >> don’t understand the why  the rank 0 boxing makes things happen the
> >> right way.
> >>>
> >>>> On 3 May 2019, at 2:32 pm, Gilles Kirouac <[email protected]> wrote:
> >>>>
> >>>> or (not as simple)
> >>>>
> >>>> c=: (128!:2)&.><
> >>>>
> >>>> g c"0 y
> >>>>
> >>>> ┌─┬───┬─┐
> >>>>
> >>>> │9│0.5│1│
> >>>>
> >>>> └─┴───┴─┘
> >>>>
> >>>> Try removing "0
> >>>>
> >>>>
> >>>> Le 2019-05-02 à 22:35, 'Rob Hodgkinson' via Programming a écrit :
> >>>>> Hi Piet, not ignorant at all !
> >>>>>
> >>>>> Try using oblique (an obscure feature is that the u in u/. can be
> >>>>> a
> >> gerund, in which case it is evoked cell wise);
> >>>>>
> >>>>> g=. *: ` -: `^
> >>>>> y=. 3 1 0
> >>>>> g /. y
> >>>>> 9
> >>>>> 0.5
> >>>>> 1
> >>>>>
> >>>>> Found in Section 15 of
> >>>>> https://www.jsoftware.com/books/pdf/brief.pdf <
> >> https://www.jsoftware.com/books/pdf/brief.pdf>.
> >>>>>
> >>>>> HTH, Regards Rob
> >>>>>
> >>>>>> On 3 May 2019, at 10:59 am, pietdion <[email protected]> wrote:
> >>>>>>
> >>>>>> Hopefully not an ignorant question.
> >>>>>>
> >>>>>> Am looking for a simple (tacit, non complicated) construction (verb?
> >>>>>> adverb? conjunction?) “c" that takes a gerund and applies the
> >> successive
> >>>>>> verbs in the gerund to successive items.
> >>>>>>
> >>>>>> A simple example is
> >>>>>>
> >>>>>>  g=. *: ` -: `^
> >>>>>>  y=. 3 1 0
> >>>>>>  g  c  y
> >>>>>> 9  0.5  1
> >>>>>>
> >>>>>> What “c”  achieves this for arbitrary gerunds g's and y’s?
> >>>>>>
> >>>>>> I realise this can be done in a variety of explicit ways and  with the
> >>>>>> agenda construct.    All I can come up with is intricate
> >> constructions.
> >>>>>> Looking for something simple and direct.   Seems to have a lot of
> >> uses.
> >>>>>> -----------------------------------------------------------------
> >>>>>> ----- For information about J forums see
> >> http://www.jsoftware.com/forums.htm
> >>>>> ------------------------------------------------------------------
> >>>>> ---- For information about J forums see
> >>>>> http://www.jsoftware.com/forums.htm
> >>>> -------------------------------------------------------------------
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> >>>> http://www.jsoftware.com/forums.htm
> >>>
> >>
> >> ---------------------------------------------------------------------
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> >>
> > ----------------------------------------------------------------------
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> 
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