[Jprogramming] Issue with dual/under

[Raul Miller]

I guess it's true that the obverse of ravel hasn't changed:

   ,inv i.9
|domain error
|       ,inv i.9
   JVERSION
Installer: j602a_win64.exe
Engine: j602/2008-03-03/16:45
Library: 6.02.071

-- 
Raul

On Fri, Oct 13, 2023 at 2:38 PM 'Viktor Grigorov' via Programming
<programming at jsoftware.com> wrote:
>
> Hey,
>
> While working on something, I came upon the following:
> Why does
>
> (|. &. ,) i.3 3
>
> result in a domain error (likewise with &.:), while
>
> ($ $ (|. @ ,) ) i.3 3
>
> doesn't?
>
> The obverse of ravel hasn't changed, and the shape while unraveled hasn't either.
> ----------------------------------------------------------------------
> For information about J forums see http://www.jsoftware.com/forums.htm