If you change the last block to this it should do what you want.

Modify the "$output" filename to suit your needs.

for my $customer ( keys %$cust ) {

    # If you want to write to a file named with the customer ID
    # my $output = "./$customer.out";

    # If you want to write to a file named with the customer name
    my $output = "./$cust->{$customer}->{name}.out";
    open (CUST_OUT, ">$output") || die "Can't write to '$output': $!\n
+";

    print CUST_OUT "CUSTOMER NAME: $cust->{$customer}->{name}\n" .
        "Device_Code Port Traf_Dir Data_Usage\n";

    for my $device ( sort by_name keys %{$bill_data->{$customer}} ) {

        for my $port ( sort keys %{$bill_data->{$customer}->{$device}}
+ ) {

            (my $short_port = $port) =~ s/^FastEthernet/Fa/g;

            for my $direction qw(OUT IN) {

                print CUST_OUT "$device $short_port $direction " .
                    $bill_data->{$customer}->{$device}->{$port}->{$dir
+ection} . $/;

            }

        }

    }
    close CUST_OUT;

}

[download]

In reply to Re^3: How to Extract Data from Text file 1 based on the Value from Text file 2 by serf
in thread How to Extract Data from Text file 1 based on the Value from Text file 2 by roborat

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.