In the simple case where you do not need the module, perl's command switches (refer: perlrun) make this task trivial. Use -a for automatic splitting -e, to make it a oneliner, -i for file backup, -F to specify the split character, -p to print the output, and > to redirect the output to a file.

UPDATE: Sorry, This reply was previously posted in the wrong thread. It has been moved to the correct place.