Useful for email formatting for any single row of boxes, but I think the in
console/jqt boxed display is not too bulky.
For multiple rows, the odd indexes would capture the data, in a likely
1 3{ ": 2 4 $ ;:'J sentence that is 2 by 4 formatted'
│J│sentence│that│is │
│2│by │4 │formatted│
though this still eats spaces in email, not in console.
________________________________
From: Raul Miller <[email protected]>
To: Programming forum <[email protected]>
Sent: Monday, October 29, 2018 11:38 AM
Subject: [Jprogramming] J word formation rules (1 { ": ;: 'J sentence')
Just a quick note:
Newcomers to J tend to not be familiar with J's word formation rules.
You can see them using ;:'J sentence' but sometimes the bulk of that
result can be distracting.
An easy variation on this theme is to format the boxed sentence and
then take row #1 (which is where all the interesting stuff is).
1{":;:'J sentence'
│J│sentence│
1{":;:'0 0 ssmb S:0 b'
│0 0│ssmb│S:│0│b│
1{":;:'/:~'
│/:│~│
1{":;:'+/%#'
│+│/│%│#│
The vertical bars are still a bit noisy, but you could go:
9!:7]11#' '
to make them be spaces. For example:
1{":;:'/:~'
/: ~
And then either 9!:7]16+i.11 or 9!:7'+++++++++|-' to put things back.
I would be tempted to put that into a cover function which is
sensitive to the starting state, but error handling and the global
character of 9!:7 makes that just a little messy. Still... messy has
never daunted me for too long, so:
jwords=:3 :0
boxy=. (16+i.11)-:9!:6''
9!:7]11#' '
r=. deb 1{":;:y
(16+i.11)9!:7@([^:boxy)'+++++++++|-'
r
)
jwords 4{::LF cut 5!:5<'jwords'
( 16 + i. 11 ) 9 !: 7 @ ( [ ^: boxy ) '+++++++++|-'
(boxy is a boolean rather than a literal result of 9!:6 because in
error cases (bad y, mostly) you wind up with 11 spaces for 9!:6'',
which can be confusing if you are looking for a boxed display. So this
way, you could just run jwords again to recover from that state.)
Still... this is way more complicated than something I would want to
throw at a beginner (who would probably not know to reach for
something named 'jwords' even if it were a builtin). So I would stick
with ;:'J sentence' and maybe give them the 1{": as an alternative if
they came back to me with complaints about the bulkiness of that
result...
...
Ok, this was *supposed* to be a quick note. Looks like I failed at that aspect.
Oftentimes things that seem simple when I think about them turn out to
be way more complicated when I try to express them.
FYI,
--
Raul
----------------------------------------------------------------------
For information about J forums see http://www.jsoftware.com/forums.htm
----------------------------------------------------------------------
For information about J forums see http://www.jsoftware.com/forums.htm
