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Posted to issues@commons.apache.org by "Sebb (JIRA)" <ji...@apache.org> on 2013/12/23 01:40:50 UTC

[jira] [Commented] (MATH-1083) Fraction - Allow zero denominator if numerator is also zero

    [ https://issues.apache.org/jira/browse/MATH-1083?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13855320#comment-13855320 ] 

Sebb commented on MATH-1083:
----------------------------

Others may say that 0/0 should be regarded as 1, because n/n == 1 for n != 0.

I don't think it makes sense to allow 0/0, as that is likely to cause all sorts of odd results.

> Fraction - Allow zero denominator if numerator is also zero
> -----------------------------------------------------------
>
>                 Key: MATH-1083
>                 URL: https://issues.apache.org/jira/browse/MATH-1083
>             Project: Commons Math
>          Issue Type: Improvement
>    Affects Versions: 3.1
>            Reporter: Andrew Brampton
>            Priority: Minor
>              Labels: Fraction
>
> The Fraction constructor rejects a denominator of zero. However, while trying to parse some Strings generated by another program, I encountered a fraction "0/0". I would say that's ambiguous as to if that's valid, but some people would agree the answer is zero.
> So, would it be possible to allow a zero denominator if the numerator is also zero. I'd be happy to provide a patch.



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