I could not find any doc on {{ and }} as Raul has used. Any pointer?
On Tue, 19 Jan 2021, 22:26 Raul Miller, <[email protected]> wrote:
> insertbefore=:{{
> 'a b'=. y
> (x{.b),a,x}.b
> }}
>
> insertafter=: {{ (x+1) insertbefore y }}
>
> 2 insertafter "1 [ 10;"1 n
> 0 1 2 10 3 4
> 5 6 7 10 8 9
>
> FYI,
>
> --
> Raul
>
> On Tue, Jan 19, 2021 at 11:51 AM Skip Cave <[email protected]>
> wrote:
> >
> > How does one design a verb that inserts specific elements into a vector
> or
> > matrix?
> >
> > For example, an "insertafter" verb would take one left argument, which is
> > the index of the array that the element is to be inserted after. The
> right
> > argument would be two boxed nouns. The first boxed noun is the set to be
> > inserted. The second boxed noun is the destination of the insertion.
> >
> > 2 insertafter 10;1 2 3 4 5
> >
> > 1 2 3 10 4 5
> > 2 insertafter 10 11;1 2 3 4 5
> > 1 2 3 10 11 4 5
> >
> > Also may need insertbefore:
> > 2 insertbefore 10;1 2 3 4 5
> >
> > 1 2 10 3 4 5
> > 2 insertbefore 10 11;1 2 3 4 5
> > 1 2 10 11 3 4 5
> >
> > Higher ranks?
> >
> > ]n=.2 5$i.10
> >
> > 0 1 2 3 4
> >
> > 5 6 7 8 9
> >
> > 2 insertafter "1 [ 10;n
> >
> > 0 1 2 10 3 4
> >
> > 5 6 7 10 8 9
> >
> >
> > What would the code for insertbefore verb look like?
> >
> >
> > Skip Cave
> > Cave Consulting LLC
> > ----------------------------------------------------------------------
> > For information about J forums see http://www.jsoftware.com/forums.htm
> ----------------------------------------------------------------------
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