scalding - scala TypedPipe switch columns -

i have val in format of typedpipe[(long, long)], how switch left , right columns around? more clearly, how create new val left column value in right column, right columns value populated in left?

use map:

val tp: typedpipe[(long, long)] = ???  val pt: typedpipe[(long, long)] = tp.map( x => (x._2, x._1) )