Re: RFA/PATCH gtest - NSNumber float != double

[David Ayers]

Alexander Malmberg wrote:

> David Ayers wrote:
> [snip]
>  
>
> > Hmm, I'll take your word  for it.  I just recalled back in the dark ages
> > someone told me (or I read it somewhere) that 25.1 would somehow be
> > represented as 2.51 * 10^1 and that a float or double only stored the
> > mantissa and exponent which shouldn't result in any discrepancies here.
> >    
>
> It does, but in base 2, and the fraction 25.1/16 can't be represented
> exactly in base 2; you get 2^4 * 1.10010 0011 0011 0011 ...
>  
Thanks,

and verified with OPENSTEP 4.2.  The "patch" is withdrawn.  I apparently 
forgot the part about base for floats and doubles also being 2. But I 
guess it is probably the only way to handle these numbers somehow 
efficiently for (floating point) processors.

Thanks for the lesson :-)

Cheers,
Dave