[Jprogramming] Repeated application of a verb

[Björn Helgason]

It is interesting to test this and trace and see the difference of using 5
and _

 outp1=: 2
 outp2=: 5
 trigger=: outp1, outp2

    - ^: (trigger */@:-. at e.~ ])^:_ 2 3 5 7

    - ^: (trigger */@:-. at e.~ ])^:_ 33

    test=: 3 : 0
    smoutput 'test'
    smoutput y

(     trigger */@:-. at e.~ ]) y
 )

    ft=: 3 : 0

smoutput 'ft'
smoutput ' in comes'
smoutput y
-y
    )

(   ft ^: (test)^:_) 2 3 5 7

(   ft ^: (test)^:5) 33

(   ft ^: (test)^:5) 2 3 5 7

(   ft ^: (test)^:_) 33

2011/10/8 Raul Miller <rauldmiller at gmail.com>

> 2011/10/8 Björn Helgason <gosinn at gmail.com>:
> >   (- ^: (trigger */@:-. at e.~ ])^:_ ) 2 3 5 7
> > 2 3 5 7
> >   (- ^: (trigger */@:-. at e.~ ])^:_ ) 33
> >
> > goes into a seemingly endless loop
>
> Of course.
>
> The sequence generated looks like this:'
>
> 33
> _33
> 33
> _33
> 33
> _33
> ...
>
> (with each subsequent value on a different line.)
>
> The loop terminates when the result list contains (presumably) a 2 or a 5.
>
> How long do imagine it will need to run, before a 2 or a 5 is generated?
>
> --
> Raul
> ----------------------------------------------------------------------
> For information about J forums see http://www.jsoftware.com/forums.htm
>



-- 
Björn Helgason, Verkfræðingur
Fornustekkum II
781 Hornafirði,
t-póst: gosinn at gmail.com
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twitter: @flugfiskur
http://groups.google.com/group/J-Programming


Tæknikunnátta höndlar hið flókna, sköpunargáfa er meistari einfaldleikans

góður kennari getur stigið á tær án þess að glansinn fari af skónum
          /|_      .-----------------------------------.
         ,'  .\  /  | Með léttri lund verður        |
     ,--'    _,'   | Dagurinn í dag                     |
    /       /       | Enn betri en gærdagurinn  |
   (   -.  |        `-----------------------------------'
   |     ) |         (\_ _/)
  (`-.  '--.)       (='.'=)   ♖♘♗♕♔♙
   `. )----'        (")_(") ☃☠