IterableUtils (Flink : Core 2.0.0 API)

java.lang.Object
- org.apache.flink.util.IterableUtils

```
public class IterableUtils
extends Object
```
A collection of utilities that expand the usage of Iterable.

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static <K,V,G extends Iterable<K>> Iterable<V>`	`flatMap(Iterable<G> itemGroups, Function<K,V> mapper)`	Flatmap the two-dimensional `Iterable` into an one-dimensional `Iterable` and convert the keys into items.
`static <E> Stream<E>`	`toStream(Iterable<E> iterable)`	Convert the given `Iterable` to a `Stream`.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - toStream
```
public static <E> Stream<E> toStream(Iterable<E> iterable)
```
    Convert the given Iterable to a Stream.
    
    Type Parameters:
    
    E - type of the elements of the iterable
    
    Parameters:
    
    iterable - to convert to a stream
    
    Returns:
    
    stream converted from the given Iterable
  - flatMap
```
@Internal
public static <K,V,G extends Iterable<K>> Iterable<V> flatMap(Iterable<G> itemGroups,
                                                                          Function<K,V> mapper)
```
    Flatmap the two-dimensional Iterable into an one-dimensional Iterable and convert the keys into items.
    
    Type Parameters:
    
    K - type of key in the two-dimensional iterable
    
    V - type of items that are mapped to
    
    G - iterable of IterableUtils
    
    Parameters:
    
    itemGroups - to flatmap
    
    mapper - convert the IterableUtils into IterableUtils
    
    Returns:
    
    flattened one-dimensional Iterable from the given two-dimensional Iterable