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https://issues.apache.org/jira/browse/NIFI-22?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mark Payne resolved NIFI-22.
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Resolution: Fixed
> Expression Language should support 'join' function
> --------------------------------------------------
>
> Key: NIFI-22
> URL: https://issues.apache.org/jira/browse/NIFI-22
> Project: Apache NiFi
> Issue Type: New Feature
> Components: Core Framework
> Reporter: Mark Payne
> Assignee: Mark Payne
> Priority: Minor
> Fix For: 0.0.1
>
> Attachments: NIFI-22.patch
>
>
> Should allow expressions like:
> ${allMatchingAttributes( 'prefix.*' ):join(', ')}
> This should be valid only if using the 'allMatchingAttributes',
> 'allAttributes' functions
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