The production of genuine arrays of (boxed) verbs is, arguably, forbidden by the Dictionary. Yet, it is allowed by the interpreter. One would have to bend, or break if you will, the rules; see, for example,
http://rosettacode.org/wiki/Closures/Value_capture#Tacit_.28unorthodox.29_version On Wed, Apr 15, 2015 at 4:26 AM, Jon Hough <[email protected]> wrote: > Actually it seems, at least in theory, if not in practice, using forks to > pass a verb array is feasible. > If I want to pass around (+/ % #) and (*:@:+:) > I could make a verb verbArray =: ((+/ % #) , (*:@:+:) ) > And I could pass it around and call 0{verbArray to execute and get the > result of the first verb with some argument, and 1{... to do the same for > the second. > Of course, the unwanted verb still gets executed, so it seems a silly > idea, but feasible. > > > From: [email protected] > > To: [email protected] > > Date: Wed, 15 Apr 2015 08:14:42 +0000 > > Subject: Re: [Jprogramming] Verb to string and Verb array > > > > In addition, I was thinking that in > > (1{k) 5 > > 0.2 > > > > the (1{k) is a so-called noun fork. > > (n u v) y is defined to be n u (v y) and therefore: > > > > 1 { (k 5) > > 0.2 > > > > because > > k 5 > > 5 0.2 1 > > > > (which is not an average, indeed) > > > > Ben > > ________________________________________ > > From: [email protected] [ > [email protected]] on behalf of Rob Hodgkinson [ > [email protected]] > > Sent: Wednesday, April 15, 2015 10:08 > > To: [email protected] > > Subject: Re: [Jprogramming] Verb to string and Verb array > > > > John, notice subtle difference in what you typed: > > > > k=:((+/),%,# (this is a train of 5 verbs, as ‘,’ is also a verb used > twice in this verb train, so you are catenating the result of the 3 verbs > (+/) then % then #, so the result is a 3 item list. > > > > as opposed to the real fork for average below, which returns an atom. > > > > a=:(+/)%# > > > > k 5 > > 5 0.2 1 > > a 5 > > 5 > > > > So your (1{k) 5 is actually a new function indexing into item 1 of the > result of k as Raul described below… (it is not indexing to the % and > applying that to 5 which you may have thought)... > > whereas (1{a) 5 returns index error (since a returns an atom). > > > > Hope this is clear now, Regards Rob > > > > > > > On 15 Apr 2015, at 5:57 pm, Raul Miller <[email protected]> wrote: > > > > > > Technically, you are not indexing the tines of the fork but you are > > > indexing the result of the fork. > > > > > > Thanks, > > > > > > -- > > > Raul > > > > > > > > > On Wed, Apr 15, 2015 at 3:09 AM, Jon Hough <[email protected]> > wrote: > > >> Yes, thanks. It seems more clear. I wasn't aware you could index > tines of a fork.e.g. > > >> > > >> k =: ((+/),%,#) > > >> > > >> > > >> (1{k) 5 > > >> gives 0.2 > > >> That was the main cause of confusion. Thanks. > > >> > > >>> From: [email protected] > > >>> Date: Wed, 15 Apr 2015 02:55:14 -0400 > > >>> To: [email protected] > > >>> Subject: Re: [Jprogramming] Verb to string and Verb array > > >>> > > >>> k is a single verb which produces 3 values for each element of its > argument. > > >>> > > >>> It is also a fork, and each tine of the fork has a leaf which is a > > >>> bond (n&v). So if you give it a left argument, that becomes a repeat > > >>> count for those operations. > > >>> > > >>> There are some other properties which you can observe by inspection > > >>> (each tine of the fork is composed of rank zero verbs, for example). > > >>> > > >>> Does that help? > > >>> > > >>> Thanks, > > >>> > > >>> -- > > >>> Raul > > >>> > > >>> On Wed, Apr 15, 2015 at 2:34 AM, Jon Hough <[email protected]> > wrote: > > >>>> I am slightly confused with how the tie (gerund) and or the linear > representation are related to this: > > >>>> > > >>>> k =: (^@:(3&*)) d. 1 2 3 > > >>>> > > >>>> > > >>>> results in : > > >>>> > > >>>> > > >>>> > > >>>> > > >>>> ((3"0 * ^@(3&*)) , (9"0 * ^@(3&*)) , 27"0 * ^@(3&*))"0 > > >>>> > > >>>> > > >>>> Which seems to be three verbs; If I do : > > >>>> k 3 > > >>>> > > >>>> > > >>>> I get : > > >>>> > > >>>> > > >>>> 24309.3 72927.8 218783 > > >>>> And I can also do: > > >>>> > > >>>> > > >>>> (0{k) 3 > > >>>> > > >>>> > > >>>> 24309.3 > > >>>> > > >>>> > > >>>> > > >>>> > > >>>> So whatever k is, it returns three nouns for one input noun, and it > is indexable so is an array of some sort. But what exactly (in terms of > parts-of-speech) is k? > > >>>> > > >>>> > > >>>> > > >>>>> Date: Tue, 14 Apr 2015 18:59:52 +0200 > > >>>>> From: [email protected] > > >>>>> To: [email protected] > > >>>>> Subject: Re: [Jprogramming] Verb to string and Verb array > > >>>>> > > >>>>> Exactly. Actually, any time you want something to work as if it > were > > >>>>> assigned to a name, you'd need brackets. > > >>>>> Eg: *: +&. won't work, while *: (+&.) will. But this might be out > of your > > >>>>> scope, since +&. is an adverb, not a verb. > > >>>>> > > >>>>> 2015-04-14 17:35 GMT+02:00 Jon Hough <[email protected]>: > > >>>>> > > >>>>>> Thanks, > > >>>>>> Just to be clear, '(',')',~ is just to bracketify the verb so > its fork > > >>>>>> (in this case) works, right? > > >>>>>> > > >>>>>> --- Original Message --- > > >>>>>> > > >>>>>> From: "Jan-Pieter Jacobs" <[email protected]> > > >>>>>> Sent: April 14, 2015 5:26 PM > > >>>>>> To: [email protected] > > >>>>>> Subject: Re: [Jprogramming] Verb to string and Verb array > > >>>>>> > > >>>>>> Hey John, > > >>>>>> > > >>>>>> I think 1. you can do using 5!:5: > > >>>>>> > > >>>>>> mean =: +/%# > > >>>>>> mean i.5 > > >>>>>> 2 > > >>>>>> 5!:5 <'mean' > > >>>>>> +/ % # > > >>>>>> datatype 5!:5 <'mean' > > >>>>>> literal > > >>>>>> ". (('(',')',~5!:5) <'mean'),'0 1 2 3 4' > > >>>>>> 2 > > >>>>>> stringify =: '(',')',~5!:5 > > >>>>>> (stringify <'mean') , '0 1 2 3 4' > > >>>>>> (+/ % #)0 1 2 3 4 > > >>>>>> > > >>>>>> For point 2, you can use gerunds to pass around verbs in a list: > > >>>>>> > > >>>>>> ger =: +`-`*`% > > >>>>>> ger > > >>>>>> ┌─┬─┬─┬─┐ > > >>>>>> │+│-│*│%│ > > >>>>>> └─┴─┴─┴─┘ > > >>>>>> 10 ((1{ger) `: 0) 20 > > >>>>>> _10 > > >>>>>> > > >>>>>> There's a massive amount of uses for gerunds, like / , ^: , } , > and so > > >>>>>> on... > > >>>>>> > > >>>>>> If you'd want to do these things (make a noun (or list there of)) > out of > > >>>>>> any type of word, I think you should be looking at atomic > representation. > > >>>>>> > > >>>>>> Jan-Pieter > > >>>>>> > > >>>>>> 2015-04-14 10:11 GMT+02:00 Jon Hough <[email protected]>: > > >>>>>> > > >>>>>>> I have a couple of questions: > > >>>>>>> 1. Is it possible to convert a verb, e.g. +/%# , to a string?": > '+/%# 2 > > >>>>>> 3 > > >>>>>>> 4' executes a stringed verb with an argument. But how would I > convert a > > >>>>>>> verb to a string in the first place? > > >>>>>>> Also, I discovered the eval verb > > >>>>>>> > > >>>>>>> > > >>>>>>> eval=: 1 : 0 > > >>>>>>> > > >>>>>>> ". 'w =. ' , u > > >>>>>>> > > >>>>>>> (ar < 'w') ab > > >>>>>>> > > >>>>>>> ) > > >>>>>>> > > >>>>>>> > > >>>>>>> Does this have an inverse? > > >>>>>>> > > >>>>>>> 2. If I have two verbs (or conjunctions, adverbs for that > matter), can I > > >>>>>>> not pass them around in a list? > > >>>>>>> e.g. in other languages, like C# I can put functions into a list > > >>>>>>> (List<Action> for example). > > >>>>>>> I searched JforC and the J website and couldn't find any way to > do this. > > >>>>>>> Thanks Jon > > >>>>>>> > ---------------------------------------------------------------------- > > >>>>>>> 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 > > >>>> > > >>>> > ---------------------------------------------------------------------- > > >>>> 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 > > > > ---------------------------------------------------------------------- > > 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
