Your two files are actually two tables in a relational database system.

So use the power of DBI and SQL.

use Modern::Perl;
use Data::Dump qw/dump/;
use DBI;

my $dbh = DBI->connect(
    "dbi:CSV:",
    "", "",
    {
        f_schema => 'test',
        f_dir    => './test',
        f_ext    => '.csv',
    }
) or die "Could not open database: $DBI::errstr";
$dbh->{RaiseError} = 1;

my $query =
'SELECT file1.vm_name, vm_cluster, vFiler_IP, vFiler_cluster FROM file
+1 join file2 WHERE file1.vm_name = file2.vm_name';
my $result = $dbh->selectall_arrayref($query);

print dump($result);

[download]
Output: 
[
  ["vm1", "fd1", "1.1.1.1", "fd4"],
  ["vm2", "fd2", "1.1.1.2", "fd3"],
  ["vm3", "fd3", "1.1.1.3", "fd2"],
  ["vm4", "fd4", "1.1.1.4", "fd1"],
]

[download]

CountZero

A program should be light and agile, its subroutines connected like a string of pearls. The spirit and intent of the program should be retained throughout. There should be neither too little or too much, neither needless loops nor useless variables, neither lack of structure nor overwhelming rigidity." - The Tao of Programming, 4.1 - Geoffrey James

My blog: Imperial Deltronics

In reply to Re: Compare 2 CSV files and create a new CSV file out of comparision by CountZero
in thread Compare 2 CSV files and create a new CSV file out of comparision by slayedbylucifer

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