Wouldn't it be possible to do fraction division and then use the scale from the resulting Fraction>>#asScaledDecimal?

- Bernhard

> Am 10.06.2019 um 18:01 schrieb Nicolas Cellier <nicolas.cellier.aka.nice at gmail.com>:
> 
> 
> 
> Le lun. 10 juin 2019 à 17:33, Bernhard Pieber <bernhard at pieber.com> a écrit :
> Hi,
> 
> For my accounting I like to use ScaledDecimal, knowing it is just a fraction with a scale.
> 
> I just stumbled upon the following:
> 0.1s * 0.5s. "0.0s1"
> 
> The underlying fraction is correct (1/20). However, the scale is 1, which surprised me. Shouldn't the scale be 2?
> 
> Maybe... But then what scale to use for division?
> 
> In VA Smalltalk which I use for accounting as well the multiplication results in 0.05s2, which I had expected. (It prints as 0.05, though.)
> 
> Fraction>>#asScaledDecimal even has the needed code:
> "Convert the receiver to a ScaledDecimal.
>         If there is a finite decimal representation of the receiver, then use the exact number of decimal places required.
>         Else, use a default number of decimals."
> 
> (1/20) asScaledDecimal. "0.05s2"
> 
> Some other strangeness:
> 3s scale. "0"
> 3 asScaledDecimal scale. "0"
> 3s asScaledDecimal scale. "8"
> 
> ScaledDecimal>>#asScaledDecimal should probably just return self.
> 
> +1
> 
> What do you think?
> 
> - Bernhard