Hello Jürgen,
After reading your email and the apl.html documentation on ⎕CR
and so, I've have two questions:
1) How does one know B is a rational number? The apl.html
documentation for 26 ⎕CR B does not showthat there is a cell type for
rationals and I could not locate one in the source code. Admittedly my
examination was cursory. 2) Why is a real number being used to
represent the numerator of a rational number? I thought ~63-
bitintegers would consistently be used to represent the parts of a
rational. 26 ⎕CR ÷ 2 yields 32 indicating that 1 is being represented
by a real rather than an integer. That is puzzling to me. It almost
seems irrational, no pun intended.
Regards.
On Tue, 2017-08-29 at 12:51 +0200, Juergen Sauermann wrote:
> Hi Fred,
>
>
>
> the existing mechanism is 27 ⎕CR B to get the numerator of
> B and 28 ⎕CR to get the denominator > 0
>
> of a quotient or 0 if the number is not a quotient (and then 27
> ⎕CR is the double B cast to uint64_t.
>
>
>
> Unfortunately there was a bug 28 ⎕CR returning always 0.
> Fixed in SVN 1004.
>
>
>
> Best Regards,
>
> /// Jürgen
>
>
>
>
>
> On 08/28/2017 11:24 PM, Frederick Pitts
> wrote:
>
>
>
> > Hello,
> >
> > Is there an existing mechanism for accessing rational number
> > numerator and denominator parts analogous to that for accessing
> > complex
> > number real and imaginary parts? If yes, please let me know
> > how. If
> > no, can a mechanism be implemented?
> >
> > Respectfully,
> >
> > Fred
> >
> >
> >
> >
>
>
>
>
>
