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https://issues.apache.org/jira/browse/METRON-831?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15960870#comment-15960870
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ASF GitHub Bot commented on METRON-831:
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Github user cestella commented on the issue:
https://github.com/apache/incubator-metron/pull/517
Ok, I migrated to a more java-ish syntax. I like it better, it's more
succinct too, I think. The following are examples:
* `MAP( [ 1, 2, 3 ], (x) -> x*2)` would yield `[2, 4, 6]`
* `MAP( [ 1, 2, 3], x -> x*2)` would yield `[2, 4, 6]`
* `REDUCE( [1, 2, 3], (sum, x) -> sum + x)` would yield `6`
* `FILTER( [1, 2, 3], () -> true)` would yield `[1, 2, 3]`
> Add lambda expressions and rudimentary functional programming primitives to
> Stellar
> -----------------------------------------------------------------------------------
>
> Key: METRON-831
> URL: https://issues.apache.org/jira/browse/METRON-831
> Project: Metron
> Issue Type: Improvement
> Reporter: Casey Stella
>
> To enable use-cases where the user may want to do simple iteration, we can
> expose simple functional primitives such as:
> * MAP
> * REDUCE
> * FILTER
> To fully support this, we will need lambda expressions as arguments to these
> functions.
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