How to split line into (key, value) pair with fixed size key

Question

I am new to Apache Spark, I have a file, where every sentences in which first 10 characters is a key and rest is a value, how do I apply spark sort on it to extract the first 10 characters of each sentence as a key and rest as a data, so in the end I get a [key,value] pair Rdd as a output.

Answer 1

map with take and drop should do the trick:

rdd.map(line => (line.take(10), line.drop(10)))

Sort:

val sorted = rdd.sortByKey

Prepare output:

val lines = sorted.map { case (k, v) => s"$k $v" }