#!/usr/bin/perl
use warnings;
use strict;
use Data::Dumper;
my $driver = "<dirlist.csv";
open DRV , $driver or die "Cannot open $driver: $!";


while( <DRV> ){
    chomp;
    my ($dirname) = shift;
    checkExistingDates($dirname);
}
close DRV;

sub checkExistingDates{
    my $dirname = shift;
    my @datelist = ("20030901", "20061017", "20050406", "20070101", "20080202");
    my @fileslist = ("DIR22.20060816", "DIR22.20050919", "DIR22.20061017", "DIR22.20060516", "DIR22.20050406");

    my @matched = ();
    foreach my $date (@datelist) {
        push (@matched, grep {/$date/} @fileslist);
    }
    print Dumper @matched;
}