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https://issues.apache.org/jira/browse/LANG-1541?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17107468#comment-17107468
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Gary D. Gregory commented on LANG-1541:
---------------------------------------
[~anthonymaidment]
Feel free to provide a PR on GitHub.
> ArrayUtils.contains() fails to handle Double.NaN
> ------------------------------------------------
>
> Key: LANG-1541
> URL: https://issues.apache.org/jira/browse/LANG-1541
> Project: Commons Lang
> Issue Type: Bug
> Components: lang.*
> Affects Versions: 3.7, 3.10
> Reporter: Anthony Maidment
> Priority: Minor
>
> ArrayUtils.contains(double[], double) does not handle Double.NaN correctly.
> That is, ArrayUtils.contains() returns false, even if the given array
> contains Double.NaN.
> For example, consider the following:
> {code:java}
> double[] a = new double[]{Double.NEGATIVE_INFINITY, Double.NaN,
> Double.POSITIVE_INFINITY};
> System.out.println(ArrayUtils.contains(a, Double.POSITIVE_INFINITY)); // true
> System.out.println(ArrayUtils.contains(a, Double.NEGATIVE_INFINITY)); // true
> System.out.println(ArrayUtils.contains(a, Double.NaN)); // false ?
> {code}
>
>
>
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