[jira] [Resolved] (FREEMARKER-73) ?seq to convert some models to a sequence

["Daniel Dekany (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FREEMARKER-73?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Daniel Dekany resolved FREEMARKER-73.
-------------------------------------
       Resolution: Implemented
    Fix Version/s: 2.3.27-incubating

> ?seq to convert some models to a sequence
> -----------------------------------------
>
>                 Key: FREEMARKER-73
>                 URL: https://issues.apache.org/jira/browse/FREEMARKER-73
>             Project: Apache Freemarker
>          Issue Type: Bug
>          Components: engine
>    Affects Versions: 2.3.26-incubating
>            Reporter: Ondra Žižka
>             Fix For: 2.3.27-incubating
>
>
> The objects I feed to FreeMarker often cotain {{Iterator}}s rather than {{Collection}}s.
> While it's quite easy to write a FreeMarker function {{iteratorToList(Iterator)}}, it would be convenient to have the following:
> A built-in that would convert various models to a sequence. Could be named {{?seq}} or {{?sequence}}.
> Usage:
> {code}<#assign foo = myIterable?seq>{code}
> {code}<#assign foo = myIterator?seq>{code}
> * A sequence would stay intact.
> * An {{Iterable}} wrapped in FM model would become internally a {{List}} - all elements consumed and stored.
> For me, other cases are not that important, but with some imagination, other models could also leverage it, like,
> * A {{Stream}} could be also turned into a {{List}}.
> * A hash could turn into a sequence of key/value pairs. That could be useful for debugging purposes.
> I am not sure if I didn't propose that already, but I could only find FREEMARKER-62.
> Thanks for considering.



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