scala - How to find max value in pair RDD? -

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i have spark pair rdd (key, count) below 

array[(string, int)] = array((a,1), (b,2), (c,1), (d,3))

how find key highest count using spark scala api?

edit: datatype of pair rdd org.apache.spark.rdd.rdd[(string, int)]

use array.maxby method:

val = array(("a",1), ("b",2), ("c",1), ("d",3)) val maxkey = a.maxby(_._2) // maxkey: (string, int) = (d,3)

or rdd.max:

val maxkey2 = rdd.max()(new ordering[tuple2[string, int]]() {   override def compare(x: (string, int), y: (string, int)): int =        ordering[int].compare(x._2, y._2) })

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