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Posted to issues@flink.apache.org by "Anton Solovev (JIRA)" <ji...@apache.org> on 2017/02/06 11:41:41 UTC
[jira] [Closed] (FLINK-1398) A new DataSet function:
extractElementFromTuple
[ https://issues.apache.org/jira/browse/FLINK-1398?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Anton Solovev closed FLINK-1398.
--------------------------------
Resolution: Won't Fix
> A new DataSet function: extractElementFromTuple
> -----------------------------------------------
>
> Key: FLINK-1398
> URL: https://issues.apache.org/jira/browse/FLINK-1398
> Project: Flink
> Issue Type: Wish
> Components: DataSet API
> 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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