[jira] [Assigned] (FLINK-1398) A new DataSet function: extractElementFromTuple

["Felix Neutatz (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-1398?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Felix Neutatz reassigned FLINK-1398:
------------------------------------

    Assignee: Felix Neutatz

> A new DataSet function: extractElementFromTuple
> -----------------------------------------------
>
>                 Key: FLINK-1398
>                 URL: https://issues.apache.org/jira/browse/FLINK-1398
>             Project: Flink
>          Issue Type: Wish
>            Reporter: Felix Neutatz
>            Assignee: Felix Neutatz
>            Priority: Minor
>
> This is the use case:
> {code:xml}
>         DataSet<Tuple2<Integer, Double>> data =  env.fromElements(new Tuple2<Integer, Double>(1,2.0));
>         
>         data.map(new ElementFromTuple());
>         
>     }
>     public static final class ElementFromTuple implements MapFunction<Tuple2<Integer, Double>, Double> {
>         @Override
>         public Double map(Tuple2<Integer, Double> value) {
>             return value.f1;
>         }
>     }
> {code}
> It would be awesome if we had something like this:
> {code:xml}
>     data.extractElement(1);
> {code}
> This means that we implement a function for DataSet which extracts a certain element from a given Tuple.



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