C:\chas_sandbox\columns-by-name>
copy con ARGVtest.pl
#!/usr/bin/perl -WCD

use strict;
use warnings;
use Data::Dumper;

$\ = $/;
my $debug = 1;

#array of fields to display
my @processFields = ('Caption','ParentProcessId','ProcessId','CommandLine');

#ARGV processing
my $searchfor = $ARGV[0] ? join(' ',@ARGV) : die("I need a process to look for."
);
^Z
        1 file(s) copied.

C:\chas_sandbox\columns-by-name>
notepad ARGVtest.pl