monad ": has unbound rank, also to avoid 0 padding when number of digits
differ, try
<@(,.&.":)"0] 12 34 567
+---+---+-----+
|1 2|3 4|5 6 7|
+---+---+-----+
Сбт, 14 Авг 2010, Alex Gian писал(а):
> Cool!
> Though note: (well, I thought bracketing might help, but no)
> (,.&.":) 12 34 56
> 1
> 2
> 0
> 3
> 4
> 0
> 5
> 6
> 0
>
> On Fri, 2010-08-13 at 19:09 -0400, Dan Bron wrote:
> > Raul wrote:
> > > It converts a number to a string of digits?
> >
> > The disconnection is on how to interpret "string of digits". If Alex
> > desires character output, then ": suffices (though it may not be obvious to
> > him what has changed, how to address the digits individually, or why it
> > "acts funny" when used on a non-scalar array).
> >
> > But if he desires numeric output, then another approach is needed.
> >
> > I wrote:
> > > ,.&.": 1000
> > > 1 0 0 0
> >
> > > .. epitomizes the Perl approach of
> > > projection into the string domain,
> > > transformation,
> > > and return.
> >
> > The suitability of ": hinges on the desirability of that last step: whether
> > or not return [to the integer domain].
> >
> > Here's one way to grade a Jem: what generalizations does it suggest?
> >
> > We notice that we're using &. (under), the explicit expression of making a
> > projection, transforming, and returning. So if we didn't want to return,
> > what would we use? Why, &.'s de-freckled brother, & ("compose"/"with"), of
> > course!
> >
> > Here's another way to grade a Jem: do the generalizations it suggests
> > actually work?
> >
> > ,.& ": 1000
> > 1
> > 0
> > 0
> > 0
> >
> > (which I suspect will make the "digitization" more obvious).
> >
> > -Dan
> >
> > ----------------------------------------------------------------------
> > For information about J forums see http://www.jsoftware.com/forums.htm
>
>
> ----------------------------------------------------------------------
> For information about J forums see http://www.jsoftware.com/forums.htm
--
regards,
====================================================
GPG key 1024D/4434BAB3 2008-08-24
gpg --keyserver subkeys.pgp.net --recv-keys 4434BAB3
----------------------------------------------------------------------
For information about J forums see http://www.jsoftware.com/forums.htm
