Just do:
po print(myStringArray)
You should be able to take advantage of the Printable or DebugPrintable protocols. Simply print out the description or debugDescription property:
Printable
DebugPrintable
description
debugDescription
po myStringArray.descriptionpo myStringArray.debugDescription
po myStringArray.map{ $0 }
if you have an array of custom objects
po myArray.map.{ $0.customProperty }