@Raul -- I think what you're proposing is in line with Henry's proposals
(see earlier thread), which I'm in-process of implementing. But these will
show on individual pages, not the NuVoc portal page.

Trouble is, I don't seriously believe in rank information on the NuVoc
portal -- much less the "mu mv mu" -stuff for adverbs and conjunctions (I
originally had: ? ? ?). I just did it as a service to people who prize it.

@Joe - I've given up on J beginners with an APL background. They've either
all ditched APL for J by now, or they never will. :-~


On Fri, Jan 24, 2014 at 3:44 PM, Joe Bogner <[email protected]> wrote:

> Connecting two threads -- Ian wrote this here:
> http://jsoftware.com/pipermail/programming/2014-January/034769.html
>
> > Thus, in the first year of learning J, I unconsciously conjectured Rank
> > didn't matter -- for most purposes. You could intuit most problems, ones
> > that don't emerge much for rank 3 arrays or less. In a lifetime of APL
> I'd
> > got away without bothering my head about verb rank.
>
> This has been my experience as well in my first year.
>
> On Fri, Jan 24, 2014 at 9:55 AM, Raul Miller <[email protected]>
> wrote:
> > Looking at your current nuvoc page, I see 22 distinct "ranks". The
> > most common rank entries are _ _ _ (27 of those) and 0 0 0 (26 of
> > those). Actual numeric values are limited to 0, 1, 2 and _. and there
> > are also a variety of abstract values (mv, mu, lv, rv, lu, ru).
> >
> > So one observation is that the casual user will not understand that
> > 'mv' means "the rank of the monadic definition of verb argument v".
>
> I think I understand the simple case of rank (at the wikipedia page
> level[1]). I like the suggestion on somehow clarifying the differences
> between the 22 possibilities.
>
> I also wonder if something really direct "verb rank matters most in
> the following situations..." would be helpful. If it's mostly rank 4+
> arrays, then the complexity of the different cases may not be
> encountered too frequently. This quote comes to mind:
>
> http://www.jsoftware.com/papers/perlis78.htm
> In APL, what flashes through your mind is a cascade of operations:
> chasing data through arrays, out of the other end of which come —
> limping and bruised, you know — seven numbers. After having built up
> arrays of rank eight and coming perilously close to a workspace full
> out from the other end comes these seven numbers — and they’re pulled
> out almost painfully — and you say to yourself, “My God, that’s
> wonderful! That’s a mechanism!”
>
> If that's what those 22 cases are intended to support, I and many
> other beginners to APL may have a long journey to go before it
> matters. Beginners to J with an APL background are likely a different
> story. Is NuVoc targeted more so at either one?
>
>
> [1] - http://en.wikipedia.org/wiki/Rank_(J_programming_language)
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