I saw the gerund"r facility and was thinking I should be able to work out
how to use it to replace/simplify
NB.*eachunderv c Applies verb in gerund m to corresponding cell of y
NB. m is gerund, v is a verb. [x] (k{u)`:6 &. v is applied to cell k of y
NB. NB.
http://www.jsoftware.com/pipermail/programming/2009-August/015982.html
NB. Has spec equivalent to conjunction "respectively" in
misc/miscutils/utils
eachunderv=: conjunction define
m v 1 :(':';'x `:6&.u y')"_1 y
:
m v 1 :(':';'x `:6&.u&>/ y')"_1 x ,&<"_1 y
)
e.g.
+:`*:`-:`%: eachunderv> ] 2;3;6;10
┌─┬─┬─┬───────┐
│4│9│3│3.16228│
└─┴─┴─┴───────┘
I note that the conjunction can now be simplified to:
eachunderv=: conjunction define
m v 1 :('x `:6&.u y')"_1 y
:
m v 1 :('x `:6&.u&>/ y')"_1 x ,&<"_1 y
)
but apart from
(+:&.>)`(*:&.>)`(-:&.>)`(%:&.>)"0 ] 2;3;6;10
I'm not seeing a way to utilise the new gerund"r functionality in this case?
On Tue, Sep 17, 2019 at 1:29 PM Henry Rich <[email protected]> wrote:
> This beta has all the language changes planned for the 9.01 release. A
> list of them is at
>
>
> https://code.jsoftware.com/wiki/System/ReleaseNotes/J901#Changes_to_the_J_engine
>
> There is a new one in this beta, one that we have been missing for a
> long time: a way to apply a different verb to each cell of an argument.
> This is now provided by
>
> gerund"r
>
> where r is not infinite.
>
> Henry Rich
>
>
> On 9/16/2019 7:09 PM, Eric Iverson wrote:
> > 901-beta-k is available.
> >
> > This version has an avx2 JE. There are now 3 standard JEs for intel 64
> bit
> > platforms. If your hardware supports avx2 (2!:7''), then your JVERSION
> will
> > indicate j64avx2 after you update to beta-k.
> >
> > If JVERSION indicates you have beta-h or later, then get the latest with:
> >
> > load'pacman'
> > je_update_jpacman_''
> >
> > If on an older version, you need a few extra steps:
> >
> > pacman update to the latest base library and restart J
> > load'pacman''
> > je_update_jpacman_'' NB. 1st time gets nonavx version - restart
> > je_update_jpacman_'' NB. 2nd time might get avx or avx2 - restart
> > ----------------------------------------------------------------------
> > For information about J forums see http://www.jsoftware.com/forums.htm
>
>
> ---
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>
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