为spark rdd元素添加前缀

Question

I have two string elements in my rdd as : "53 45 61","0 1 2". I would like to zip and map it together as Key value pair ,adding a prefix "C" to each of keys

expected output:

C53 -> 0, C45-> 1, C61-> 2 

Currently this is the code I am using

val prefix = "C"

newRDD = RDD.map(x=>(prefix + (x._1.split(" ")) zip x._2.split(" "))

receiving result below:

53 -> 0, C45-> 1, 61-> 2 .

What am I missing here?

Answer 1

you're currently adding your prefix to an Array(53, 45, 61) (didn't know you could do that). Do you mean to do x._1.split(" ").map(prefix + _) to add it to each element instead?