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https://issues.apache.org/jira/browse/MATH-1682?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18004746#comment-18004746
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Gilles Sadowski commented on MATH-1682:
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This code snippet is not compilable...
Please provide a complete (JUnit) test function.
> RealVector.sparseIterator() throws OutOfRangeException for empty vectors
> ------------------------------------------------------------------------
>
> Key: MATH-1682
> URL: https://issues.apache.org/jira/browse/MATH-1682
> Project: Commons Math
> Issue Type: Bug
> Components: legacy
> Reporter: Ruiqi Dong
> Priority: Minor
> Original Estimate: 0.5h
> Remaining Estimate: 0.5h
>
> When calling {{sparseIterator()}} on an empty {{RealVector}} (dimension = 0),
> an {{OutOfRangeException}} is thrown instead of returning an empty iterator.
> This violates the expected behavior of iterator pattern where empty
> collections should return empty iterators.
> *Test Case:*
> {code:java}
> RealVector v = create(new double[0]);
> Iterator<Entry> it = v.sparseIterator();// Throws OutOfRangeException {code}
>
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