Hi!
I uploaded my attempt at this to the files section of this group:
http://clojure.googlegroups.com/web/mod-sgn.diff
It adds the modulus operator plus, as a by-product, the signum
operator (sgn).
Comments most welcome!
Kind regards,
achim
On 29 Dez., 07:01, Rich Hickey <richhic...@gmail.com> wrote:
> On Dec 29, 12:44 am, "Mark Engelberg" <mark.engelb...@gmail.com>
> wrote:
>
>
>
> > So I understand that we're supposed to discuss ideas here to try to
> > gain "mindshare" which is why last week I brought up the issue with
> > Clojure missing mod (which works differently from rem on negative
> > numbers). So really, no one else cares about this, or was the post
> > just lost in the shuffle of holiday time?
>
> > On Mon, Dec 22, 2008 at 4:04 AM, Mark Engelberg
>
> > <mark.engelb...@gmail.com> wrote:
> > > Anyone know why there is no modulo or mod function in Clojure's core?
> > > I know there is a rem function, but that's not the same thing. mod
> > > and rem behave differently when the first number is negative.
>
> > > (mod -2 5) -> 3
> > > (rem -2 5) -> -2
>
> > > modulo n is important for making things stay in the range from 0 to
> > > n-1, for example, if you're working with vectors of length n. You
> > > need to ensure that negative numbers wrap around to the positive
> > > range. rem does not do this.
>
> > > I'm more familiar with Scheme than CL, and I know PLT Scheme provides
> > > both modulo and remainder. But according to the Wikipedia
> > > (http://en.wikipedia.org/wiki/Modulo_operation), Common Lisp also
> > > provides both mod and rem functions. So why not Clojure? Is it a
> > > Java defeciency?
>
> Holidays here.
>
> Feel free to create an issue for this:
>
> http://code.google.com/p/clojure/issues/list
>
> Patch (from a registered contributor) welcome.
>
> Rich
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Clojure" group.
To post to this group, send email to clojure@googlegroups.com
To unsubscribe from this group, send email to
clojure+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/clojure?hl=en
-~----------~----~----~----~------~----~------~--~---
