I think, the first two 'fold multiple' entries (scan in k9 lingo) should have F:: instead of -~; and at least the entry for k9’s do-n scan doesn’t work. It’s the only one I tried since it obviously cannot give that result. So maybe there are more mistakes.
Am 06.02.21 um 04:17 schrieb Devon McCormick: > NYCJUG's own Will Gajate presented some work on folds recently: > https://code.jsoftware.com/wiki/User:Will_Gajate/FoldVariants . > Please take a look and feel free to embellish. > > On Fri, Feb 5, 2021 at 4:06 PM Henry Rich <henryhr...@gmail.com> wrote: > >> I will be happy for you guys to do whatever you think makes the >> documentation best. We are all beginners with Fold. >> >> hhr >> >> On 2/5/2021 1:19 PM, Hauke Rehr wrote: >>> I strongly support this. Folds belong at the core >>> of any functional language but I didn’t use them >>> since I got used to doing things differently >>> when they hadn’t been around; and when they were >>> introduced, I, too, was disappointed by the lack >>> of easily understood and adaptable examples. >>> At least that’s the way things were then. >>> But I was happy seeing them introduced. >>> >>> On one thing, I disagree, though. >>> They may share that common umbrella page, >>> but I think it should point to six subpages. >>> The way I (don’t) understand them, they are >>> conceptually too close for users to be taught >>> about them seperately. >>> >>> Am 05.02.21 um 19:06 schrieb Raul Miller: >>>> I've been thinking about >>>> https://code.jsoftware.com/wiki/Vocabulary/fcap and some of my >>>> struggles with it, in its current form. >>>> >>>> (1) The page covers six different conjunctions, and does not begin to >>>> give examples until half way down the page. >>>> >>>> Conceptually, I would prefer a page dedicated to each in the >>>> vocabular, with the diagrams from this page as reference material >>>> elsewhere (perhaps an appendix, perhaps a lab, perhaps an introductory >>>> document, perhaps repeated from each vocabulary page, perhaps >>>> something else). >>>> >>>> (2) Although the page includes a statement suggesting that it's better >>>> to use the dyad form of a fold multiple verb than the monad form, the >>>> page contains no worked examples using the dyad form (for example: >>>> using numbers or characters). >>>> >>>> (3) The u argument is an efficiency mechanism, which means sometimes >>>> it's best to not use it and put the efficiency elsewhere. >>>> >>>> (4) The result of the monad use of a fold multiple verb is 1 less than >>>> the length of the original list, and that can be useful but it can >>>> also take some getting used to. The result of the dyad use of a fold >>>> multiple verb is the same length as the y argument. >>>> >>>> #]F:.,: i.12 >>>> 11 >>>> #1 ]F:.,: i.12 >>>> 12 >>>> >>>> ---------------------------- >>>> >>>> Anyways, I think we need some good canonical examples of use for these >>>> conjunctions, so that people can see how things work. >>>> >>>> (I'll see if I can come up with something... but for now I wanted to >>>> leave this here, before I forget about these issues, again.) >>>> >>>> Do any of you have a nice example or two? >>>> >>>> Thanks, >>>> >> >> >> -- >> This email has been checked for viruses by AVG. >> https://www.avg.com >> >> ---------------------------------------------------------------------- >> 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
