Martin, it seems to be fixed.
vb=: 13 :'+:y'
]A=:vb i.21
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40
dc=: 13 :'".vb=:''+:y'''
dc
3 : '".vb=:''+:y'''
]B=:dc i. 21
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40
A-:B
1
Linda
-----Original Message-----
From: Programming <[email protected]> On Behalf Of Raul
Miller
Sent: Thursday, October 18, 2018 11:03 AM
To: Programming forum <[email protected]>
Subject: Re: [Jprogramming] Using rank to avoid looping - reference?
Anything that can produce different results at different times can be "changed"
by 13 : to produce a result obtained when it was running.
For example: 13 :'fread ''file.txt'''
--
Raul
On Wed, Oct 17, 2018 at 6:30 PM Jose Mario Quintana
<[email protected]> wrote:
>
> I am aware that executing code with ". relying on explicit context can
> trip
> 13 : , for instance,
>
> u=. 3 : '".''+:y'''
>
> u 5
>
> 10
>
> v=. 13 : '".''+:y'''
>
> v 5
>
> 2
>
> v
>
> 2:
>
> I am not quite sure but probably there are more glitches, according
> to,
>
> NuVoc 13 :
> https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fcode
> .jsoftware.com%2Fwiki%2FVocabulary%2Fcom%23m13&data=02%7C01%7C%7C2
> dac8c6ed7084eedcedf08d6350ad08d%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1
> %7C0%7C636754717892231673&sdata=WBCGWG87XTSaLHVUUIIcPTo%2B98z4CrUm
> LdDC7cCmhx8%3D&reserved=0
>
> "If you get exotic, you may encounter a bug or two in the
> implementation of 13 :"
>
>
>
> On Wed, Oct 17, 2018 at 1:39 PM Martin Kreuzer <[email protected]> wrote:
>
> > José -
> >
> > Thanks for pointing out that issue in the first place.
> >
> > I wasn't aware of the compiler module being overzealous sometimes ...
> >
> > Are there any other known (I'm fighting for words, might I call
> > them) 'glitches' comparable to this one, and where would they be
> > documented for lookup..?
> >
> > -M
> >
> > At 2018-10-17 16:25, you wrote:
> >
> > >Martin,
> > >
> > >In my example, using + instead of -, u was the double of a single
> > >roll and v was the sum of two "independent" rolls.
> > >
> > >Yours is a far better example for illustrating the issue,
> > >
> > > ( u=. 3 : ' T - (T=. ? y)' )
> > >3 : ' T - (T=. ? y)'
> > >
> > >u is one roll minus itself which produces zeroes; whereas
> > >
> > > ( v=. 13 : ' T - (T=. ? y)' ) ? - ?
> > >
> > >is the difference of two "independent" rolls.
> > >
> > >Thus, for example,
> > >
> > > u 0 0 0 0 0
> > >0 0 0 0 0
> > >
> > >whereas,
> > >
> > > v 0 0 0 0 0
> > >_0.0389238 0.321837 0.0862073 0.552116 _0.134629
> > >
> > >Thanks! I had one of those moments after I read your posts... Why
> > >did I not think of that? :)
> > >
> > >
> > >On Wed, Oct 17, 2018 at 8:08 AM Martin Kreuzer
> > ><[email protected]>
> > wrote:
> > >
> > > > Addendum:
> > >
> > > > Consider, in contrast, the behaviour of this *explicit* definition:
> > >
> > > > ee=. 3 : 'T - T=. ?y'
> > > > ee 10+i.7
> > > > 0 0 0 0 0 0 0
> > >
> > > > Same result as working *outside* a verb definition:
> > >
> > > > ] T=. ? 10+i.7
> > > > 6 6 0 9 12 1 5
> > > > T - T
> > > > 0 0 0 0 0 0 0
> > >
> > > > -M
> > >
> >
> >
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