Oh, I see... you use are building the train. I completely forgot about
Evoke Gerund too!.. There is so much functions built into single primitives.
Thank you for explanations! :)
And hey, so we can do this better?
( ({.,@,.}.) [`+`-`*`% ) , <']'
┌─┬─┬─┬─┬─┬─┬─┬─┬─┐
│[│+│[│-│[│*│[│%│]│
└─┴─┴─┴─┴─┴─┴─┴─┴─┘
No need to delete the element from the list, just append ^.^
NB. Yes, I hate Gmail web UI... using email client because of that)
Tue, 12 Jul 2016 09:51:20 -0400
Raul Miller <[email protected]>:
> My fault, I should have gone through the steps.
>
> (Beware that gmail will mutilate the display of the results I am going
> to show here. A lot of people got paid a lot of money for that design
> and those design decisions, and for managing those people, so this
> design flaw is probably not going to go be going away. I do have the
> option of imposing a font description which would override that for
> you, but the list software will [justifiably] strip that out. Anyways,
> to work around this user interface feature, select the "Message text
> garbled?" option from the upper right dropdown menu, and try to ignore
> the irrelevant message about encoding.)
>
> So...
>
> Let's say that u v w ... will be + - * %. We want them in a list of
> gerunds, and we also want [ and ] in the list, for x and y. We're
> going to manipulate the list, though, so let's first just get them out
> there:
>
> [`+`-`*`%`]
> ┌─┬─┬─┬─┬─┬─┐
> │[│+│-│*│%│]│
> └─┴─┴─┴─┴─┴─┘
>
> Next we want to replicate the x argument for each of our verbs. This
> is not perfect, but we are getting closer to what we need:
>
> ({.,.}.) [`+`-`*`%`]
> ┌─┬─┐
> │[│+│
> ├─┼─┤
> │[│-│
> ├─┼─┤
> │[│*│
> ├─┼─┤
> │[│%│
> ├─┼─┤
> │[│]│
> └─┴─┘
>
> Next, let's ravel that so we're back to a flat list:
>
> ({.,@,.}.) [`+`-`*`%`]
> ┌─┬─┬─┬─┬─┬─┬─┬─┬─┬─┐
> │[│+│[│-│[│*│[│%│[│]│
> └─┴─┴─┴─┴─┴─┴─┴─┴─┴─┘
>
> Now, we just need to get rid of the rightmost [ in that list. We can
> select the second to last element of a list using _2 { list. And, we
> can delete from a list based on indexing by triple boxing our index:
>
> ((<<<_2){ {.,@,.}.) [`+`-`*`%`]
> ┌─┬─┬─┬─┬─┬─┬─┬─┬─┐
> │[│+│[│-│[│*│[│%│]│
> └─┴─┴─┴─┴─┴─┴─┴─┴─┘
>
> By the way, any expression which gets us this list could be
> substituted here. For example, here's a minor variation:
>
> 1|.1}.,@({.,.}.) [`]`+`-`*
> ┌─┬─┬─┬─┬─┬─┬─┐
> │[│+│[│-│[│*│]│
> └─┴─┴─┴─┴─┴─┴─┘
>
> Anyways, now we just need to convert that into a verb train:
>
> (((<<<_2){ {.,@,.}.) [`+`-`*`%`])`:6
> [ + [ - [ * [ % ]
>
> and we can apply it to some sample arguments:
>
> 10 ((((<<<_2){ {.,@,.}.) [`+`-`*`%`])`:6) 20
> 15
>
> Is that correct? Easy enough to test:
>
> 10 + 10 - 10 * 10 % 20
> 15
>
> I hope this helps,
>
> --
> Raul
>
>
>
> On Tue, Jul 12, 2016 at 9:19 AM, dahn oak <[email protected]> wrote:
> > Thank you, Raul. It's quite complicated for understanding yet, but I
> > appreciate it!
> >
> > Tue, 12 Jul 2016 09:04:01 -0400
> > Raul Miller <[email protected]>:
> >> No, but you can make one.
> >>
> >> For example:
> >>
> >> x(((<<<_2){{.,@,.}.)[`u`v`w`...`])y
> >>
> >> I hope this helps.
> >>
> >> --
> >> Raul
> >>
> >>
> >> On Tue, Jul 12, 2016 at 8:38 AM, dahn oak <[email protected]>
> >> wrote:
> >> > Hello, is there any language cunstruction that is equivalent to:
> >> > x u x v x w ... y
> >> > where x and y are the arguments of the construction and u,v,w,... is a
> >> > sequence of dyadic verbs?
> >> >
> >> > I just don't want to duplicate my x argument many times. Specifically, I
> >> > want to do something like 10,~10,.~10,10,.y where y is a scalar matrix
> >> > to make a "border" for it (number 10).
> >> >
> >> > dahn oak - [email protected]
> >> > ----------------------------------------------------------------------
> >> > For information about J forums see http://www.jsoftware.com/forums.htm
> >> ----------------------------------------------------------------------
> >> For information about J forums see http://www.jsoftware.com/forums.htm
> >
> > dahn oak - [email protected]
dahn oak - [email protected]
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