[R] Quiz {was "Quit asking me .."}

[Henrik Bengtsson]

First, 42 characters...

Q="no";class(Q)=Q;print.no=function(x)q(Q)

Interestingly, the following works too (41 chars)

Q="";class(Q)=Q;print.=function(x)q("no")

Is it legal though to have empty class names?

And finally, the beautiful one with 28 characters

Q="no";class(Q)=Q;print.no=q

Have nice day!

Henrik Bengtsson
Lund University

> -----Original Message-----
> From: r-help-bounces at stat.math.ethz.ch 
> [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Deepayan Sarkar
> Sent: den 17 september 2003 09:17
> To: Martin Maechler; R-help at stat.math.ethz.ch
> Subject: Re: [R] Quiz {was "Quit asking me .."}
> 
> 
> On Wednesday 17 September 2003 01:36, Martin Maechler wrote:
> 
> > How can you write (quite short!) R code such that
> > typing
> > 	"Q"
> >
> > -- without any  "()" -- will quit R (without asking about saving).
> >
> > [But you shouldn't really keep that code active in your standard R 
> > session  because it would be too easy to accidentally shut down R !]
> >
> > For the advanced ones:
> > My shortest solution uses 51 characters of R code, can you 
> beat that?
> 
> Barely, 46 removing all spaces:
> 
> print.q<-function(x)q("no");Q<-1;class(Q)<-"q"
> 
> We can also replace <- by = in recent (and _ in older) 
> versions of R to 
> decrease this further.
> 
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