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https://issues.apache.org/jira/browse/MATH-754?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13216783#comment-13216783
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Travis Hanna commented on MATH-754:
-----------------------------------
I'll think on this a bit. I haven't considered having an entire class
dedicated to representing a fraction with constrained denominators. I'm not
sure if it would be useful or not. My initial instinct is that it's probably
not very useful.
> Additional Fraction Constructor
> -------------------------------
>
> Key: MATH-754
> URL: https://issues.apache.org/jira/browse/MATH-754
> Project: Commons Math
> Issue Type: Improvement
> Affects Versions: 3.0
> Environment: All
> Reporter: Travis Hanna
> Priority: Minor
> Labels: features, newbie, patch
> Fix For: 3.0
>
> Attachments: math.patch
>
>
> I'm writing some code which outputs fractional measurements meant for human
> consumption. I need a constructor for Fraction which allows you to restrict
> the denominators to a finite set. This is necessary due to the fact that
> real-world tools are only available with certain fractions. For example, it's
> next to impossible to find a ruler with 1/7 inch marked :).
> I'm attaching a patch which implements the functionality. I've attempted to
> mimic the style of the existing code as much as possible. One caveat: I don't
> speak French so the french error message is a computer-generated translation
> and probably very poor.
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