[Jprogramming] Numbers for numbers, otherwise leaving alone

[June Kim]

2007/12/27, Björn Helgason <gosinn at gmail.com>:
>   NaN=: __

Thanks, but is it conventional to use __(negative infinite) as a NaN value?

>   maybe_numb=: 3 : 0
> a=.NaN ". y
> if. a = NaN do. a=. y end.
> )
>   maybe_numb '12223'
> 12223
>   maybe_numb 'David'
> David
>
>
>
> 2007/12/27, June Kim <juneaftn at gmail.com>:
> >
> > Current numbers operation is:
> >    ". '12223'
> > 12223
> >    ". 'David'
> >
> >
> > I could change the behavior when y can't be turned into a number:
> >
> >    _99 ". 'David'
> > _99
> >
> > However, how would you define a verb that is:
> >
> >    maybe_numb '12223'
> > 12223
> >    maybe_numb 'David'
> > 'David'
> >
> > I am looking for a simple solution.
> > ----------------------------------------------------------------------
> > For information about J forums see http://www.jsoftware.com/forums.htm
> >
>
>
>
> --
> Björn Helgason, Verkfræðingur
> Fugl&Fiskur ehf, Þerneyjarsund 23, Box 127
> 801 Grímsnes ,t-póst: gosinn at gmail.com
> Skype: gosiminn, gsm: +3546985532
> Landslags og skrúðgarðagerð, gröfuþjónusta
> 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  |
>   (   -.  |        `-----------------------------------'
>   |     ) |        (\_ _/)
>  (`-.  '--.)       (='.'=)
>   `. )----'        (")_(")
>
> ----------------------------------------------------------------------
> For information about J forums see http://www.jsoftware.com/forums.htm
>