Don -
Thanks for reminding me of the shortcut to minutes via (4{sdt).
Don, Bill -
Thanks for your suggestion defining the stuff as a verb (I did some
experimenting along that road), but that doesn't put away the need to
call it with an empty string as a parameter (sdt '') (mins ''). And I
think that anwers my original question: it is always needed ...
btw, (exit y) being a "wrapper" for (2!:55 y), could you point me to
its (exit) definition..?
Raul -
Thanks for pointing me to the (wd) command reference (I wasn't aware of that).
I successfully tried your timer example (having first experienced the
need for cleanup :), but only while calling the verbs with parameter
(sdt '') resp (mins'') -- different to what you cited in your mail
where you seem to have used (sdt) solely ...
-M
At 2016-04-16 18:18, you wrote:
In addition to bill lam's excellent advice, there's also
http://code.jsoftware.com/wiki/Guides/Window_Driver/Command_Reference
which may interest you. Consider, for example: wd 'timer 30000'
|value error: sys_timer_z_ | (i.0 0)"_ sys_timer_z_$0 |value
error: sys_timer_z_ | (i.0 0)"_ sys_timer_z_$0 |value error:
sys_timer_z_ | (i.0 0)"_ sys_timer_z_$0 Now, if I
define: sys_timer_z_=: verb def 'sdt=: 6!:0 y' and wait for the
timer event to go off, I have a value for sdt And, now that I see
that it's working (so I do not have to shut down my J session to
regain control), I can make the timer event run more often: sdt
2016 4 16 14 11 27.4896 wd 'timer 1' sdt 2016 4 16 14 12
30.5991 sdt 2016 4 16 14 12 31.4788 Here, I have asked jqt to
keep executing that command line ((i.0 0)"_ sys_timer_z_$0) once
every millisecond whenever I'm not doing anything else. (The way it
works, if something long running is happening, that command line
can't be run, so those events get skipped.) But maybe keep in mind
mickey mouse's experience in fantasia (the sorcerer's apprentice):
if this gets out of control, you'll have quite a mess to clean up. I
hope this helps, -- Raul On Sat, Apr 16, 2016 at 9:24 AM, bill lam
<[email protected]> wrote: > std is a noun, (or a value in other
programming languages). It is usually > immutable. Just curious,
why didn't you write > sdt=: 6!:0 > ppchk=: 9!:10 > or > sdt=: 3 :
'6!:0 y' > > min=: 3 :0 > {: 5 {. sdt y > ) > > For the other
question, IEEE double precision is limited to 15 or 16 > significant
digits, so that print precision cannot improve accuracy. > On Apr
16, 2016 6:48 PM, "Martin Kreuzer" <[email protected]> wrote: > >>
One of my teachers once told me "It's even sillier to not ask a
silly >> question" ... so here I go: >> >> Extracting SystemDateTime
I do get a vector like this >> ] sdt=. 6!:0 '' >> 2016 4 16 9 12
59.257 >> which -from now on- has that value >> sdt >> 2016 4 16
9 12 59.257 >> >> To get the current minute I might do something
like >> ] mins=. {: 5 {. sdt >> 12 >> which gives the same result
some time after, unless I explicitely do >> ] mins=. {: 5 {.
sdt=. 6!:0 '' >> 30 >> >> Q: >> Is there a way to sort of "wrap" the
foreign (6!:0 '') so that "sdt" will >> show the _current_ date/time
string when called..? >> (Sorry if I missed to make myself
clear.) >> >> Same question arose when e.g. trying stuff like >> --
check print precision >> ppchk=. 9!:10 '' >> -- set print
precision >> ppset=. 3 : '9!:11 (y)' NB. seems to work
... >> ppset 7 >> >> 9!:10 '' >> 7 >> ppchk >>
7 >> ppset 11 >> >> 9!:10 '' >> 11 >> ppchk NB. has (of
course) still the previous value ... >> 7 >> >> And (again) here
comes the silly >> Q: >> Is there a way to define "sdt" or "ppchk"
(from above) so that they >> immediately react to changes to the
environment..? >> (Looks to me if I'm asking for a verb without a
noun to act on; is that >> the moment the empty string ('') comes
into play and the dog chases its >> tail..?) >> >> -M >> >>
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