[jira] [Commented] (FREEMARKER-101) Add random number generation - perhaps 5.random()?

["Daniel Blazquez (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FREEMARKER-101?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17273091#comment-17273091 ] 

Daniel Blazquez commented on FREEMARKER-101:
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Hi, I've landed on this page looking for a way to make random changes to some elements of a page with FE (for presentation purposes). Javascript is not an option (and I would prefer to do it with FE).

I think [~woon_san] 's idea for sequences is great, even more useful than a random function.

> Add random number generation - perhaps 5.random()?
> --------------------------------------------------
>
>                 Key: FREEMARKER-101
>                 URL: https://issues.apache.org/jira/browse/FREEMARKER-101
>             Project: Apache Freemarker
>          Issue Type: New Feature
>            Reporter: Ondra Žižka
>            Priority: Major
>
> I can't find a way to easily create a random number in FreeMarker.
> Could we add it please?
> Something like:
> {code:java}
> 0?random() --> 0 to 0.9999999 like Math.random() 
> 0?random(5,9) --> random from that interval
> Or (incompatible with the logic above)
> 5?random() --> 0 to 5
> 5?random(-1) --> 0 to 4
> And if this is possible - to make it compatible with the two above:
> random() --> 0 to 0.9999999 like Math.random() 
> random(5,9) --> random from that interval{code}
> I am not quite sure about the overall consistency of the logic.
> Also, collections could have a built-in to pick random item:
> {code:java}
> myItems.random(){code}
> As a shorthand for
> {code:java}
> myItems[myItems.size().random(-1)]{code}
>  
> See here: https://stackoverflow.com/questions/3680273/how-to-get-a-random-integer-in-freemarker-template/51554484#51554484



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