[plt-scheme] dot notation issue
To find out what is going on, make a function like same-parity that
simply returns the dotted x. Then, try it in the interactions window
to see what the function gets for x. Use arguments that are like the
ones you expect to be created in same-parity.
rac
On Feb 6, 2009, at 4:46 PM, Lisa Gandy wrote:
> Hi,
> I have the following code..
>
> (define (same-parity p . x)
> (define ind (remainder p 2))
> (cond ((null? x) '())
> ((= ind (remainder (car x) 2))
> (cons (car x) (same-parity p (cdr x))))
> (else (same-parity p (cdr x)))))
>
> I thought that x would be passed in as a list however
> when I run this function I get...
> (require (lib "trace.ss"))
> > (trace same-parity)
> > (same-parity 1 2 3 4 5)
> |(same-parity 1 2 3 4 5)
> |(same-parity 1 (3 4 5))
>
> What is going on here?
>
> Thanks!
> _________________________________________________
> For list-related administrative tasks:
> http://list.cs.brown.edu/mailman/listinfo/plt-scheme
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.racket-lang.org/users/archive/attachments/20090206/a5d95f5c/attachment.html>