Pascal wrote:

"seems like there is a need for a new primitive say `.. (tie below)"

The Jx primitive  `. (knot) does the following:


   1`.+
┌─────┬─┐
│┌─┬─┐│+│
││0│1││ │
│└─┴─┘│ │
└─────┴─┘
   +/`.1 2 3 4
┌───────┬───────────┐
│┌─┬───┐│┌─┬───────┐│
││/│┌─┐│││0│1 2 3 4││
││ ││+│││└─┴───────┘│
││ │└─┘││           │
│└─┴───┘│           │
└───────┴───────────┘
   +/`.1 2 3 4 `:6
10

See [0] and references there in.

[0] [Jprogramming] J Extensions, Jose Mario Quintana
    http://www.jsoftware.com/pipermail/programming/2014-March/036377.html


On Thu, Jan 5, 2017 at 8:53 PM, 'Pascal Jasmin' via Programming <
programm...@jsoftware.com> wrote:

> there is always the ugliness that lr spits out
>
>   lr (1 ar)`+
> (<(,'0');1),<,'+'
>
> (but parenthesized in case it is bound to modifier)
>
> > One solution would be to make an exception for noun ARs, i. e. those
> beginning with (<'0').  Those could be left in boxed form, rather than
> converted back to their value, when they appear as operands to (`).
>
>
> This sounds promising, so
>
> (<(,'0');1)`+
>
> seems like there is a need for a new primitive say `.. (tie below)
>
>
> ar =: 1 : '5!:1 <''u'''
> isNoun_z_ =: (0 = 4!:0 ( :: 0:))@:<
> isgerund =: 0:`(0 -.@e. 3 : ('y (5!:0)';'1')"0)@.(0 < L.) :: 0:
> isgerundA =: 1 : ' if. isNoun ''u'' do. isgerund m else. 0 end.'
> tie =: 2 : 'if.  u isgerundA do. if. v isgerundA do. m ar , v ar else. m ,
> v ar end. else. if. v isgerundA do. u ar , n  else. u ar , v ar end. end. '
>
> so the above could be displayed (lr) and input as
>
> 1`..+
>
> but
>
>
> (<(,'0');1)`+
>
> wouldn't break anything since its a valid lr that creates the valid
> gerund.  I can't imagine anyone was relying on buggy lr output that doesn't
> convert back to ar form.
>
>
>
>
> ----- Original Message -----
> From: Henry Rich <henryhr...@gmail.com>
> To: programm...@jsoftware.com
> Sent: Thursday, January 5, 2017 8:20 PM
> Subject: Re: [Jprogramming] fixed tacit produces an error when reassigned
>
> I understand this problem a little better now.
>
> The trouble would be something like
>
> v0`v1`n2`v3
>
> where the n2 is a user-created AR.  How should you convert this back to
> linear rep?
>
> There are no fingerprints to indicate that a gerund was created by (`)
> turning a verb into an AR.  So when the LR is generated, any AR that is
> an operand to (`) is assumed to have been created by (`).
>
> One solution would be to make an exception for noun ARs, i. e. those
> beginning with (<'0').  Those could be left in boxed form, rather than
> converted back to their value, when they appear as operands to (`).
>
> Would that change break anything?
>
> Henry Rich
>
>
>
> On 1/3/2017 9:37 PM, Henry Rich wrote:
> > Operands to modifiers such as m}, ^:n, m`, and `n are flagged if they
> > are recognized as gerunds.
> >
> > This seems to me to be a mistake for m` and `n: they should not be
> > flagged until the derived adverb has been executed.  The problem you
> > report is that m/n are interpreted as if they had come from converting
> > a noun to an AR, rather than as a noun in themselves.
> >
> > But Roger said it was an error in 5!:5.  When Roger diagnoses a
> > problem differently from me, I assume I am wrong.  I'll have to go
> > think about it.
> >
> > In the meantime, you can consider whether there would be a problem
> > with delaying the recognition of m` and `n until the derived verb is
> > executed.
> >
> > Henry Rich
> >
> >
> >
> > On 1/3/2017 11:18 AM, Jose Mario Quintana wrote:
> >> Sorry, I pressed the wrong button and my previous message was
> >> incomplete;
> >> this should have been the full message:
> >>
> >> I am afraid it is the superbug that has been discovered and
> >> rediscovered a
> >> few times; see [0, 1, 2 and 3].
> >>
> >> References
> >>
> >> [0] [Jprogramming] Table of Verbs, Jose Mario Quintana
> >> http://www.jsoftware.com/pipermail/programming/2013-April/032358.html
> >>
> >> [1] [Jprogramming] tacit adverb, Dan Bron
> >> http://www.jsoftware.com/pipermail/programming/2012-February
> /027341.html
> >>
> >> [2] [Jgeneral] Looks like a bug in "., Dan Bron
> >> http://www.jsoftware.com/pipermail/general/2009-August/033231.html
> >>
> >> [3] [Jprogramming] Linear Representation Bug?, Roger Hui
> >> http://www.jsoftware.com/pipermail/programming/2009-August/016011.html
> >>
> >>
> >> On Tue, Jan 3, 2017 at 11:09 AM, Jose Mario Quintana <
> >> jose.mario.quint...@gmail.com> wrote:
> >>
> >>> I am afraid it is the superbug that has been discovered and
> >>> rediscovered a
> >>> few times; see [0, 1, 2 and 3].
> >>>
> >>>
> >>> References
> >>>
> >>> [0] [Jprogramming] Table of Verbs, Jose Mario Quintana
> >>> http://www.jsoftware.com/pipermail/programming/2013-April/032358.html
> >>>
> >>> [1] [Jprogramming] tacit adverb, Dan Bron
> >>> http://www.jsoftware.com/pipermail/programming/2012-February
> >>> /027341.html
> >>>
> >>> [2] [Jgeneral] Looks like a bug in "., Dan Bron
> >>> http://www.jsoftware.com/pipermail/general/2009-August/033231.html
> >>>
> >>>
> >>> On Tue, Jan 3, 2017 at 10:12 AM, 'Pascal Jasmin' via Programming <
> >>> programm...@jsoftware.com> wrote:
> >>>
> >>>> This file works j804 and j805, when copied and run with F8, you may
> >>>> need
> >>>> to fix newlines
> >>>>
> >>>>
> >>>>
> >>>>
> >>>> NB.---------------------------------------------------------
> >>>> -------------------
> >>>> NB. Wicked Tacit Toolkit...
> >>>> NB.---------------------------------------------------------
> >>>> -------------------
> >>>>
> >>>> NB. Load it using 0!:0 or similar or
> >>>> NB. paste it on an J editing window and use Crtl-A Crtl-E or
> >>>> NB. of course, load it using a hot key (or replace '=.' by '=:' if you
> >>>> must)
> >>>>
> >>>> NB. A word is a noun, verb, adverb or conjunction
> >>>>
> >>>>
> >>>> (_ o=. @:) (c=. "_) (e=. &.>) (x=. @:[) (y=. @])
> >>>>
> >>>> an=.  <@:((,'0') ,&< ])          NB. Atomizing words (monadic verb)
> >>>>
> >>>> Cloak=. (0:`)(,^:)               NB. Cloaking (the atomic
> >>>> representaions
> >>>> of)
> >>>> NB. adverbs or conjunctions as monadic or
> >>>> NB. dyadic verbs (adv)
> >>>> Cloak=. ((5!:1)@:<'Cloak')Cloak  NB. Cloak verbing itself! (monadic
> >>>> ver)
> >>>>
> >>>> 'amper at evoke fix rank tie'=. Cloak o < e o ;: '& @: `: f. " `'
> >>>> NB. Verbing some adverbs and conjunctions
> >>>>
> >>>> train=. (evoke&6) :. an f.       NB. (`:6) with a convinient obverse
> >>>> NB. (monadic verb)
> >>>> box=. (< o train "0) f.          NB. Boxing primitives and pro-words
> >>>> NB. (monadic verb)
> >>>>
> >>>> af=. an o fix
> >>>>
> >>>> (a0=. `'') (a1=. (@:[) ((<'&')`) (`:6)) (a2=. (`(<(":0);_)) (`:6))
> >>>> av=. ((af'a0')`)  (`(af'a1')) (`(af'a2') ) (`:6)
> >>>> NB. Adverbing a monadic verb (adv)
> >>>> assert 1 4 9 -: 1 2 3 *: adv
> >>>>
> >>>> aw=. < o ((0;1;0)&{::)  NB. Fetching the atomic representation
> >>>>
> >>>> u (a3=. (o (train o aw f.)) ('av'f.)) (a4=. "_)
> >>>>
> >>>> adv=. train o ((af'a4') ; ] ; (af'a3')"_) f.av
> >>>> assert 1 4 9 -: 1 2 3      *: adv
> >>>> assert 6     -: * (,^:(0:`(<'/')))                  adv 1 2 3
> >>>> assert 0 1 3 -: (*:`(+/\)) (train f. o (0&{ , (<'-') , 1&{)) adv 1 2 3
> >>>>
> >>>> a3=. (o (aw f.)) ('av'f.)
> >>>>
> >>>> Adv=. (train f. @:) (train o ((af'a4') ; ] ; (af'a3')"_) f.av)
> >>>> assert 1 4 9 -: 1 2 3      ((<'*:') ; ] )                   Adv
> >>>> assert 6     -: *          (< , ((<'/')"_))                   Adv 1
> >>>> 2 3
> >>>> assert 0 1 3 -: (*:`(+/\)) (0&{ , (<'-') , 1&{)@:(('';1)&{::) Adv 1
> >>>> 2 3
> >>>>
> >>>> Ver=. Cloak o af f. NB. Verbing after fixing a pro-adverb or
> >>>> pro-conjunction
> >>>> NB. (monadic verb)
> >>>> ver=. Cloak o an f. NB. Verbing after fixing an adverb or conjunction
> >>>> NB. (monadic verb)
> >>>>
> >>>> NB. Defining cv in terms of itself...
> >>>> cv=. ((rank&_) o < o train)f.adv (>@:)     NB. First version
> >>>> cv=. (train f. cv at (<x rank _ c)) f.adv  NB. Constant verb
> >>>> u ( cv=. (  >cv at (<x rank _ c)) f.adv )
> >>>> NB. Constant word (adv)
> >>>> NB. (cv is to words as c is to nouns)
> >>>> assert (CRLF cv _) -: CRLF
> >>>> assert (u   cv _) <adv -: u   <adv
> >>>> assert (!@# cv _) <adv -: !@# <adv
> >>>> assert (< o ((Ver'cv') o train <'/') _) -: ( < o train (<'/'))
> >>>> assert (< o ((Ver'cv') o train <'"') _) -: ( < o train (<'"'))
> >>>>
> >>>>
> >>>> NB. Fetch and From...
> >>>> pointers=. (<: o - o i.)`i. @.(0<])
> >>>>
> >>>> Fetch=. (] amper {:: cv)e o pointers f.adv  NB. Verbs mnemonics
> >>>> pointers
> >>>> NB. (e.g., ( 'u0 u1 u2 u3'=. 4 Fetch ) j ( 'v0 v1 v2 v3'=. _4 Fetch
> >>>> ) )
> >>>>
> >>>> assert (< o train  3 Fetch) -: ( 0&({::) 1&({::)  2&({::)) (< adv)
> >>>> assert (< o train _3 Fetch) -: (_3&({::) _2&({::) _1&({::)) (< adv)
> >>>>
> >>>> From=.  (] amper {   cv)e o pointers f.adv  NB. Verbs mnemonics
> >>>> pointers
> >>>> NB. From=.  (] ([ amper train y)(({  `'')c))e o i. f. adv
> >>>> NB. (e.g., ( 'u0 u1 u2 u3'=. 4 From ) j ( 'v0 v1 v2 v3'=. _4 From ) )
> >>>>
> >>>> assert (< o train  3 From ) -: ( 0&{ 1&{      2&{     ) (<adv)
> >>>> assert (< o train _3 From ) -: (_3&{     _2&{ _1&{     ) (<adv)
> >>>>
> >>>> Left=.  (at [cv)e f.adv
> >>>> Right=. (at ]cv)e f.adv
> >>>>
> >>>> mRS=. (`'') (<&.:train f.av) (`,)(`]) (`:6) (train f. @:
> >>>> )(&:(an f.))
> >>>> NB. Monadic recursion scope
> >>>> assert    (1 + (1:`(* $:@<:)@.*)         mRS  4) -: 25 NB. Factorial
> >>>> fixed
> >>>> dRS=. (`'') (<&.:train f.av) (`,) (`]) (,`) ([`) (`:6) (train f. @:
> >>>> )(&:(an f.))
> >>>> NB. Dyadic recursion scope
> >>>> assert (3 (1 + (1:`(%~ * $:&:<:)@.(*@:[))dRS) 7) -: 36  NB.
> >>>> Binomial fixed
> >>>>
> >>>>
> >>>> mRS is properly assigned and works as intended from file,
> >>>>
> >>>>
> >>>> mRS
> >>>> ((((((`'')(((`'')(&(<&.:(,^:(0:``:)&6 :.(<@:((,'0') ,&<
> >>>> ])))@:[)))((`_)(`:6))))(`,))(`]))(`:6))(,^:(0:``:)&6 :.(<@:((,'0')
> ,&<
> >>>> ]))@:))(&:(<@:((,'0') ,&< ])))
> >>>>
> >>>> but trying to to assign it to this linear representation produces a
> >>>> syntax error
> >>>>
> >>>> mRS =: ((((((`'')(((`'')(&(<&.:(,^:(0:``:)&6 :.(<@:((,'0') ,&<
> >>>> ])))@:[)))((`_)(`:6))))(`,))(`]))(`:6))(,^:(0:``:)&6 :.(<@:((,'0')
> ,&<
> >>>> ]))@:))(&:(<@:((,'0') ,&< ])))
> >>>> |syntax error
> >>>>
> >>>>
> >>>>
> >>>> is this a bug in linear representation? is it directly assignable?
> >>>> ------------------------------------------------------------
> ----------
> >>>> For information about J forums see http://www.jsoftware.com/forum
> s.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
>
> ----------------------------------------------------------------------
> 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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