Hernan, floating point values are fractions of the form
+/- m * 2^k
for positive integers m of up to a certain number of bits. Your example
requires
13/10 = m * 2^k
which is not possible. In slow motion...
2^k = 13/10m
To get rid of 13, m must be 13*n...
2^k = 1/10n
Now, 1/10 = 1/5 * 1/2, so...
2^{k+1} = 1/5n
and then we reach
n 2^{k+1} = 1/5
which is absurd for integer n, k.
Andres.
Hernan Wilkinson wrote:
> I added this new issue that happens on the latest image.
> I'm posting it here because I think it is an important bug because it
> affects the number model.
> The problem is related with all fractions who's denominator is not
> power of two. (130/100 = 1.3 or 1/5 = 0.2, etc)
> (See
> Float>>adaptToFraction: rcvr andCompare: selector where it does
> ....
> "Try to avoid asTrueFraction because it can cost"
> selector == #= ifTrue: [
> rcvr denominator isPowerOfTwo ifFalse: [^false]].
>
> ...)
>
>
> Hernan.
>
>
>
_______________________________________________
Pharo-project mailing list
[email protected]
http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project
