Since loading a script diverts the input path from keyboard to script,
there might be an interaction there causing the problem.
This might be a job for the Immex Sentence described at
https://code.jsoftware.com/wiki/Vocabulary/Foreigns#immex .
Rather than ending your script with
runit $0
you would end with
9!:27 'runit $0'
9!:29 (1)
and the sentence would be executed as if entered from the keyboard.
Henry Rich
On 4/27/2020 2:52 PM, Devon McCormick wrote:
This is a recurring question on this forum. One response is this one: (Die
- Prompt - Die! )
https://code.jsoftware.com/wiki/NYCJUG/2015-01-13#Die_-_Prompt_-_Die.21 .
A better answer might be to use the windowing code in J - see
https://code.jsoftware.com/wiki/Scripts/SourceDestDir for a simple example.
As far as triggering something on startup, this might be helpful -
https://code.jsoftware.com/wiki/Guides/Startup - or it may be TMI. The
short answer is to supply a script to the J session or an inline sequence
of J commands, or both as seen here:
jconsole C:\path\MyConfig.ijs -js "2!:55'' [ wait 1 [ (LF,~":6!:0'')
fappend 'time.out' [ 1!:44'C:\startingPath'"
This runs the"MyConfig.ijs" file then the line of commands in the
double-quotes following "-js" which exits the J session after waiting for a
second after writing a timestamp (6!:0'') to a file after changing to the
"startingPath" directory.
I hope this helps.
On Mon, Apr 27, 2020 at 2:05 PM Anthony O'Malley <[email protected]>
wrote:
Greetings, All. My first post. A bit lengthy. Sorry.
I am a life-long user of APL who turned to J two years ago and have more
or less settled into it, long enough to really appreciate its elegance.
My learning curve has been steep but very pleasurable, and useful.
I have read "Learning J" and all about foreign
conjunctions (especially, 1!:), but I seem to have missed something.
None of my APL "quote quad" expertise is related to how a user of a J
script
can engage interactively with the script once loaded-- e.g., if the
script displays 'Please enter
birthdate', the user inputs, input gets error checked and assigned to a
variable.
I have a verb USRINPT in the script which uses (1!:2)&2 for prompts and
(1!:1)1 for user input assigned to a variable. The verb works fine in
the interpreter when I load the script and execute it myself with
USRINPT ''.
But, I want the USRINPT verb to execute upon loading the script, so the
user immediately sees the intro text re proper formation of dates (this
is fine), then the prompt 'Birthdate?' (this works too) and J returns to
the left margin awaiting input (this doesn't work).
That is, when I load the script that has the explicit definition
USRINPT in it, with next line USRINPT '' (execute USRINPT), the
(1!:2)&2 verb in USRINPT displays the prompt, but the assignment of user
input to variable line n=: (1!:1)1 doesn't happen. It's as though it's
not there. Of course, since the session has no values for the variables
supposed to be provided by n=: (1!:1)1, the script eventually shows an
error, and stops.
I'm not seeing something--about J foreign conjunctions or about scripts
(J is my first experience of programming with scripts).
I've looked and looked in the J docs. I would be grateful for a pointer
in the right direction.
Thanks, Tony
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