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