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From "Manu Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (GEARPUMP-289) Add FoldFunction
Date Mon, 06 Mar 2017 13:02:32 GMT

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

Manu Zhang updated GEARPUMP-289:
--------------------------------
    Description: {{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. 

> 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
>
> {{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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