Ruiqi Dong created MATH-1682:
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Summary: 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
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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