2007/12/28, Björn Helgason <[EMAIL PROTECTED]>:
> Similar to:
>
> maybe_numb=: 3 : 0
> a=._. ". y
> n=. _. = a
> [ ^: n y
> )
> maybe_numb '12223'
> 12223
> maybe_numb 'David'
> David
> maybe_numb '3+45'
> 3+45
0+maybe_numb '123'
|domain error
| 0 +maybe_numb'123'
maybe_numb=: 3 : 0
a=._. ". y
n=. _. = a
y ([ ^: n) a
)
0+maybe_numb '123'
123
0+maybe_numb '123+1'
|domain error
| 0 +maybe_numb'123+1'
>
>
> 2007/12/27, Roger Hui <[EMAIL PROTECTED]>:
> >
> > mbn=: ] [^:(_.=]) _.&".
> > mbn '12e3'
> > 12000
> > mbn '3+45'
> > 3+45
> >
> >
> >
> > ----- Original Message -----
> > From: June Kim <[EMAIL PROTECTED]>
> > Date: Thursday, December 27, 2007 4:41
> > Subject: [Jprogramming] Numbers for numbers, otherwise leaving alone
> > To: Programming forum <[email protected]>
> >
> > > 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: [EMAIL PROTECTED]
> 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
>
----------------------------------------------------------------------
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