Honestly, I think we need more games here.
Games are useless enough that people can mess up freely while working
on them, but can be "deep" enough to engage whatever techniques we
feel comfortable bringing to bear.
That said, doing anything which ties to real world equipment would
also be incredibly interesting. (But likely also gets into
compatibility issues.)
That said, our way of doing things here has tended to result in poor
long-term compatibility, which means that printed examples of code
frequently do not work. I ran into this just now looking for how to
prompt the user to type something. These things can always be worked
around, if the coder is sufficiently experienced, but it can be tough.
Anyways, to stay somewhat on topic for the forum (though not for the
titled subject of this thread -- I should probably have thought harder
to find a game context which uses folds), here's an update to the
rosettacode bulls and cows game implementation for j903:
plural=: {{ (":m),' ',n,'s'#~1~:m }}
bullcow=: {{ NB. usage: bullcow ''
answer=: 1+4?9
9!:19]0
r=.,:'Guess my answer (type ''guess'' followed by'
r=.r,'a four digit answer where every digit is different).'
r=.r,''
r=.r,'My response will be the answer of bulls (exact digit'
r=.r,'matches and the answer of cows (digit matches in the'
r=.r,'wrong position).'
}}
guess=: {{
if. 0~:{.0$,y do.'Guesses must be a single answer'return.end.
if. -.''-:$y do.'Guesses must be a single answer'return.end.
if. y~:<.|y do.'Guesses must be a positive integer'return.end.
if. 9999<y do.'Guesses must have four different digits'return.end.
if. 123>y do.'Guesses must have four different digits'return.end.
number=. 10 10 10 10#:y
if. 4~:#~.number do.
'Guesses must have four different digits'return.end.
if. number-:answer do.
'You win.' [ bullcow ''
else.
bulls=. +/number=answer
cows=. (+/number e.answer)-bulls
echo bulls plural 'bull',' and ',cows plural 'cow','.'
end.
}}
Thanks,
--
Raul
On Sat, Feb 27, 2021 at 6:41 AM R.E. Boss <[email protected]> wrote:
>
> I'm one of that silent minority (no longer so), since I'm unaware of the
> working of Fold, but I am convinced that "the best is the enemy of the good".
> But it is not the first time, and it will not be the last time, I see
> discussions in the forum from which I know it would be better if people would
> use J and share their experiences, without trying to immediately change the
> world we live in.
> In other words, there is a lack of 'programming' in this forum, IMHO.
>
>
> R.E. Boss
>
>
> -----Original Message-----
> From: Programming <[email protected]> On Behalf Of
> 'Sergey Kamenev' via Programming
> Sent: donderdag 25 februari 2021 18:13
> To: [email protected]
> Subject: Re: [Jprogramming] Contrintuitive argument order in Fold right verb
>
> I think the invention of Fold verbs is incredibly powerful, so I use them.
> But, as you understand,
> I think that these verbs can be made even stronger by making a slight
> improvement.
>
> Sergey.
>
> 25.02.2021 19:51, Eric Iverson пишет:
> > I am a member of the silent majority on this issue.
> >
> > I have been pleased with the civility of the fold discussion
> > considering how emotional language issues can be.
> >
> > J is not designed by vote or committee. There are always going to be
> > strong disagreements. But we are a small community and are best served
> > by, at the appropriate time, burying those disagreements and moving
> > on. I think that time has come for fold.
> >
> > J is the better for having fold. Let's focus now on using it and
> > sharing how it can be used. Some labs or wiki pages would be nice!
> >
> >
> >
> >
> > On Thu, Feb 25, 2021 at 11:25 AM Hauke Rehr <[email protected]> wrote:
> >
> >> Good point about the silent ones: you’re right, I guess.
> >>
> >> I still disagree regarding fold being used the way you tell us.
> >> What you want to do can be done with / and the likes.
> >> Again, the main advantage of the fold verbs from my pont of view is
> >> that there may be any kind of initial data processed by v in a way
> >> given by x’s items’ values.
> >>
> >> But let’s just settle on “we agree to disagree” – I don’t think
> >> further back and forth will lead us somewhere.
> >>
> >> (and maybe I need to get some rest ere I write more rubbish here)
> >>
> >> Hauke
> >>
> >> Am 25.02.21 um 17:19 schrieb 'Sergey Kamenev' via Programming:
> >>> I think Henry Rich is most likely a genius programmer.
> >>>
> >>> By the way, I am a supporter of meritocracy, when the weight of a
> >>> person's voice depends on his merits.
> >>>
> >>> But a programming language is written for the community.
> >>> And so the voice of the community when discussing new features
> >>> should carry a lot of weight.
> >>>
> >>> The definition of a fold itself implies that there is an array that
> >>> will fold.
> >>> However, the initial value does not have to be an array, but what is
> >>> collapsed arg must be an array.
> >>>
> >>> Right argument have more arrayness in comparing with left arg.
> >>>
> >>> The silent majority most likely does not use Fold verbs, therefore
> >>> they are silent, since this topic does not concern them.
> >>>
> >>> Sergey.
> >>> --------------------------------------------------------------------
> >>> -- For information about J forums see
> >>> http://www.jsoftware.com/forums.htm
> >>
> >> --
> >> ----------------------
> >> mail written using NEO
> >> neo-layout.org
> >>
> >> ---------------------------------------------------------------------
> >> - For information about J forums see
> >> http://www.jsoftware.com/forums.htm
> >>
> > ----------------------------------------------------------------------
> > 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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