[jira] [Created] (SPARK-18855) Add RDD flatten function

[Linbo (JIRA)]

Linbo created SPARK-18855:
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             Summary: Add RDD flatten function
                 Key: SPARK-18855
                 URL: https://issues.apache.org/jira/browse/SPARK-18855
             Project: Spark
          Issue Type: New Feature
          Components: Spark Core
            Reporter: Linbo


A new RDD flatten function is similar to flatten function of scala collections:

{code:title=spark-shell|borderStyle=solid}

scala> val rdd = sc.makeRDD(List(List(1, 2, 3), List(4, 5), List(6)))
rdd: org.apache.spark.rdd.RDD[List[Int]] = ParallelCollectionRDD[0] at makeRDD 
at <console>:24

scala> rdd.flatten.collect
res0: Array[Int] = Array(1, 2, 3, 4, 5, 6)

{code}



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