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https://issues.apache.org/jira/browse/FREEMARKER-8?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14997746#comment-14997746
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Daniel Dekany commented on FREEMARKER-8:
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As of your last attempt, there's no `++` in FTL. You can't change variables
without an assignment.
> Adding to a hash (map)
> ----------------------
>
> Key: FREEMARKER-8
> URL: https://issues.apache.org/jira/browse/FREEMARKER-8
> Project: Apache Freemarker
> Issue Type: New Feature
> Components: engine
> Affects Versions: 2.3.23
> Reporter: Ondra Žižka
>
> It would be nice to assign to a map this way:
> {code}
> <#assign map["key"] = 1>
> {code}
> and also
> {code}
> <#assign map["key"]++>
> {code}
> So far I think it's like this but can't get it work:
> {code}
> <#assign map += {classification.classification :
> map[classification.classification]!++}>
> {code}
> Thanks for considering.
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