Re: [Chicken-users] How to detect when you have +nan.0 or similar?

[felix winkelmann]

On 1/30/07, John Cowan <address@hidden> wrote:
> Matthew Welland scripsit:
>
> > What is the right way to do this? I resorted to using :
>
> I like the definition (lambda (f) (not (= f f)), which depends on the
> fact that NaN is not numerically equal to NaN.
>
> You can define "infinite?" as (lambda (f) (= f (+ f f))).

(string->number "+nan.0") ?


cheers,
felix