[Thomas FOURNIER <th...@gmail.com>]

Hello,

I'm trying to assign a unique (and deterministic) ID to a globally sorted
DataSet.

Given a DataSet of String, I can compute the frequency of each label as
follows:

val env = ExecutionEnvironment.getExecutionEnvironment

val data = env.fromCollection(List("a","b","c","a","a","d","a","a","a","b","b","c","a","c","b","c"))

val mapping = data.map(s => (s,1))
.groupBy(0)
  .reduce((a,b) => (a._1, a._2 + b._2))
  .partitionByRange(1)
  .sortPartition(1, Order.DESCENDING)




I want the most frequent label to be ID 0 and so on in decreasing order. My
idea was to use zipWithIndex. But this does not guarantee that my DataSet
will be