[jira] [Resolved] (GEARPUMP-289) Add FoldFunction

["Manu Zhang (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/GEARPUMP-289?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Manu Zhang resolved GEARPUMP-289.
---------------------------------
       Resolution: Fixed
    Fix Version/s: 0.8.3

Issue resolved by pull request 167
[https://github.com/apache/incubator-gearpump/pull/167]

> Add FoldFunction
> ----------------
>
>                 Key: GEARPUMP-289
>                 URL: https://issues.apache.org/jira/browse/GEARPUMP-289
>             Project: Apache Gearpump
>          Issue Type: Sub-task
>          Components: streaming
>    Affects Versions: 0.8.2
>            Reporter: Manu Zhang
>            Assignee: Manu Zhang
>             Fix For: 0.8.3
>
>
> {{FoldFunction}} is a more general case of the existing {{ReduceFunction}}. It allows users to combine input values and put it into an accumulator (e.g. {{Collection}}). Without it, we have to firstly map an element to a collection and reduce over all collections, which is verbose and inefficient. 



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