easy question, how to double a variable
Pablo Torres N.
tn.pablo at gmail.com
Thu Sep 24 15:32:58 CEST 2009
On Sep 24, 5:51 am, Iain King <iaink... at gmail.com> wrote:
> On Sep 23, 7:36 pm, David C Ullrich <dullr... at sprynet.com> wrote:
> > On Tue, 22 Sep 2009 02:34:53 +0000, Steven D'Aprano wrote:
> > > On Mon, 21 Sep 2009 13:50:23 -0500, David C Ullrich wrote:
> > >> But you actually want to return twice the value. I don't see how to do
> > >> that.
> > > What?
> > > Seriously?
> > You're saying it _can_ be done in Python? They must have added
> > something to the standard library again. I mean how can you return
> > twice a value without a twice function to start with? I've tried.
> > You'd think
> > def twice(n):
> > return twice(n)
> > would work, but I get this really long error message.
> > > You're not just yanking the OP's chain???
> > That would be cruel. I mean the guy has enough problems already...
> Sorry, there is no 'twice' builtin. I think what you are looking for
> def twice(n):
> return return n
Actually, what he wants is:
(def twice (x)
(+ (once x) (once x)))
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