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https://issues.apache.org/jira/browse/COLLECTIONS-578?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15001082#comment-15001082
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Thomas Neidhart commented on COLLECTIONS-578:
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Collections 4 introduced an Equator interface for this purpose, which is
already used in some places.
> CollectionUtils method to accept Comparator as overloaded arguments
> -------------------------------------------------------------------
>
> Key: COLLECTIONS-578
> URL: https://issues.apache.org/jira/browse/COLLECTIONS-578
> Project: Commons Collections
> Issue Type: Improvement
> Affects Versions: 4.0
> Reporter: Abraham Tehrani
> Priority: Minor
>
> CollectionUtils has numerous methods that would benefit from having an
> overloaded argument that accepts Comparators. This is helpful when Objects in
> the Lists do not implement equals the way that is wanted.
> Example if CollectionUtils.containsAny(...) accepted a Comparator interface,
> we could then define a custom implementation of comparison.
> This would make it far more flexible
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