Thanks a lot! But can you explain the syntax? I am aware of some basic PERL (but hardly oneliners!), and can make out that you're splitting $_ on the patterns "+#" or "=#" and assigning it it to the array F. But I dont understand much of anything else in the statement.Could you tell me where could I enter further statements to process the fields in the loop body (say, an if statement to test something on the second array parameter)?

Also, if possible, can you suggest some on-line PERL one-liner references?