How do I iterate RDD's in apache spark (scala)

Question

I use the following command to fill an RDD with a bunch of arrays containing 2 strings [\"filename\", \"content\"].

Now I want to iterate over every of those occurre

Answer 1

for (element <- YourRDD)
{
     // do what you want with element in each iteration, and if you want the index of element, simply use a counter variable in this loop beginning from 0 
     println (element._1) // this will print all filenames
}