I don't know about the domain error. I can explain the name, though
perhaps not justify it in this case:
Only named entities can be debugged line-by-line. If you have a verb like
unnamed =: 3 : 0"0
text
)
it doesn't play well with the debugger, because the inner verb has no
name (the verb 'unnamed' is a compound). The debugger tries to make
things better by looking for verbs whose definition contains ':' and
quietly splitting those into parts, assigning each part to a name, and
putting them back together. So the debug code would reassign so that
unnamed =: unnamedd4B7g0"0
unnamedd4B7g0 =: 3 : 0
text
)
which will debug much better.
I think the debugger is doing that here, because 'fastincl' will contain
a ':' in its definition. The rewriting doesn't accomplish much in this
case.
Henry Rich
On 7/10/2019 3:20 AM, 'Mike Day' via Programming wrote:
It's the odd name and the fact that a domain error doesn't arise if
you just run the phrase.
For the sake of this reply, I've just opened up a new JQt session,
and a new script,
pasting in the defs I'd listed earlier, then loading and running as
described below.
Here's the script, with the notated session output appended, at NB.
####...,
all below this sign-off.
Cheers,
Mike
NB. copy of minimal script and session output
fastmax=: 1 : 0
B=. C=. 1"_1 y
while. +./C do.
i=. C i.1
B=. 0 i} B
B=. -.@:u&(i{y)&.(B&#) y
C=. C *. B
B=. 1 i} B
end.
B#y
)
cmp=: +./@E.&>
fastincl=: cmp fastmax
NB. #############################################################
NB. notated copy of session
load 'c:/d/j807/user/temp/215.ijs' NB. minimal script
NB. running without debug
fastincl 'abcde'
abcde
(cmp fastmax) 'abcde'
abcde
NB. invoke debug with Run/Debug OR ctrl-K
NB. In debug window, select "fastmax" using "Stop Manager",
NB. and choose "Stop All Lines"
NB. Invoke it as follows:
NB. a) indirectly via "fastincl", the derived verb, on any string
fastincl 'abcde'
NB. immediate display in "debug" ...
NB. top output pane:
NB. >[0] cmp fastincld4B7g0 NB. Where does this name arise?
NB. other two panes show:
NB. domain error
NB. fastincl[header] cmp fastincl
NB. cmp v +./@E.&>
NB. fastincl v cmp fastincld4B7g0
NB. check names
names 3
cmp fastincl
names 1 NB. what is fastincld4B7g0 ?!?!
fastincld4B7g0 fastmax
clear''
names 1
load 'c:/d/j807/user/temp/215.ijs'
NB. set up "debug" as before
NB. rerun with (cmp fastmax) rather than "fastincl"
(cmp fastmax) 'abcde' NB. can step through line by line in "debug"
as usual
On 10/07/2019 00:43, Henry Rich wrote:
I haven't tried to recreate this yet, but: what is the problem?
Should it not get a domain error? Or is it the odd name
'fastincld4B7g0'?
Henry Rich
On 7/9/2019 6:35 PM, 'Mike Day' via Programming wrote:
9.0 beta and 8.07 - JQt -Windows 10
M
Sent from my iPad
On 9 Jul 2019, at 23:32, bill lam <bbill....@gmail.com> wrote:
what is the JVERSION ?
On Wed, Jul 10, 2019, 1:27 AM 'Mike Day' via Programming <
programm...@jsoftware.com> wrote:
Something for Henry, I think.
Starting to have a look at Louis' variants on Vadim's approach, I
tried
using debug on "fastincl" , invoked by ctrl-K.
Setting stop on all lines in either fastincl =: cmp fastmax
or in fastmax and then running
fastincl lines
results in
"
domain error
fastincl[header] cmp fastincl
"
in debug's middle pane,
with
"
[0] cmp fastincld4B7g0
"
displayed in the top pane
The lowest pane displays:
"
cmp v +./@E.&>
fastincl v cmp fastincld4B7g0
"
This happens in both J 9.01 beta and J 8.07, under Windows 10 .
Debug seems ok however when explicitly running "(cmp fastmax) lines "
So it's probably something to do with fastmax being an adverb,
but here
are
Louis' definitions to save hunting for them in the correspondence:
fastmax=: 1 : 0
B=. C=. 1"_1 y
while. +./C do.
i=. C i.1
B=. 0 i} B
B=. -.@:u&(i{y)&.(B&#) y
C=. C *. B
B=. 1 i} B
end.
B#y
)
cmp=: +./@E.&>
fastincl=: cmp fastmax
debug behaves just the same for
fastincl 'abc'
so I won't bother defining "lines" here.
This is probably known behaviour, but it's new to me!
Thanks,
Mike
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