Are you looking for this?
PosDiff=: {{la-sm[sm=.x<.y[la=.x>.y}}
--
Raul
On Fri, Sep 24, 2021 at 5:01 AM R.E. Boss <[email protected]> wrote:
>
> Again, I know all that, since quite long actually.
> But now with the direct definition, {{ }} , how is it done there?
>
>
> R.E. Boss
>
>
> -----Original Message-----
> From: Programming <[email protected]> On Behalf Of
> Elijah Stone
> Sent: vrijdag 24 september 2021 10:34
> To: [email protected]
> Subject: Re: [Jprogramming] single line direct definition
>
> On Fri, 24 Sep 2021, R.E. Boss wrote:
>
> > See https://www.jsoftware.com/help/learning/12.htm
> >
> > My point is for a non-trivial verb, how can I cram this in one DD line.
>
> One way is to perform the definitions in-line:
>
> 4 : 'la - sm [ la =. x >. y [ sm =. x <. y'
>
> There is also Michal Wallace's proposal to use '..' as a sentence separator,
> with which you might write:
>
> 4 : 'la =. x >. y .. sm =. x <. y .. la - sm'
>
> -E
>
> > R.E. Boss
> >
> >
> > -----Original Message-----
> > From: Programming <[email protected]> On Behalf
> > Of Elijah Stone
> > Sent: vrijdag 24 september 2021 10:12
> > To: [email protected]
> > Subject: Re: [Jprogramming] single line direct definition
> >
> > That is the same as:
> >
> > 4 : 0
> > la =. x >. y
> > sm =. x <. y
> > la - sm
> > )
> >
> > We can substitute the intermediate variables:
> >
> > 4 : 0
> > (x >. y) - (x <. y)
> > )
> >
> > And collapse onto one line: 4 : '(x >. y) - (x <. y)'
> >
> > Worth noting is that we can write this as a fork: >. - <.
> >
> > -E
> >
> > On Fri, 24 Sep 2021, R.E. Boss wrote:
> >
> >> From Learning J
> >>
> >> PosDiff =: 4 : ('la =. x >. y' ; 'sm =. x <. y' ; 'la - sm')
> >>
> >> How do I transfer this in a single line direct definition?
> >>
> >>
> >> R.E. Boss
> >> ---------------------------------------------------------------------
> >> - 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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> ----------------------------------------------------------------------
> For information about J forums see http://www.jsoftware.com/forums.htm
> ----------------------------------------------------------------------
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