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https://issues.apache.org/jira/browse/CRUNCH-29?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13427655#comment-13427655
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Josh Wills commented on CRUNCH-29:
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The serialization of DoFns etc. is provided by Crunch in the serialize method
of the JobPrototype class. I think there was a JIRA once upon a time that
discussed adding serializable object support to MR directly, but it didn't get
picked up.
> Add string concatenation in CombineFn
> -------------------------------------
>
> Key: CRUNCH-29
> URL: https://issues.apache.org/jira/browse/CRUNCH-29
> Project: Crunch
> Issue Type: Improvement
> Reporter: Gauthier Ambard
> Priority: Minor
> Labels: newbie
> Attachments: 0001-CRUNCH-29-Patch-adding-string-concatenation.patch,
> 0001-CRUNCH-29-Patch-adding-string-concatenation.patch, CRUNCH-29b.patch
>
>
> Add two methods for string concatenation in CombineFn: one with a space
> acting as a separator between the string, and one without.
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