How to create RDD(Sub-Array[String]) from RDD(Array[String])?

Question

My initial RDD; Array[Array[String]], looks something like:

    a b h c ....... d e x q
    d r d x ....... e q g m
    f e u t ....... q t g y
    a b h c ....... d e x q
    d r d x ....... e q g m
    f e u t ....... q t g y
    ....
    ....

New RDD; Array[Array[String]], that contains:

u t ...... q t
h c ...... d e

Any idea on how to work on it? Size of the array is large, so one could want the sub-array of any size. Thanks in advance.

Answer 1

It looks like all you need here is just drop* :

rdd.map(_.drop(2).dropRight(2))

And if you're in doubt it is usually useful to check Scala collections docs .