I need some help pulling an occurance of a sting out of a file. This sting can happen at different positions in the file, and it does not occur a set amount of times. I'ld like to be able to pull the sting out of the file, and save it to another file, also ignoring duplcate occurances of the string. Here's what the string looks like:

authDataAlias="cell-tstc-65_DM/userQ"

Sring will always be: authDataAlias="*-*-*_DM/*

Here's an example of the line containing the string:

<factories xmi:type="resources.jdbc:CMPConnectorFactory" xmi:id="CMPConnectorFactory_1195273978412" name="dataSource" authMechanismPreference="BASIC_PASSWORD" authDataAlias="cell-tstc-65_DM/userQ" connectionDefinition="ConnectionDefinition_1054132487569" cmpDatasource="DataSource_1195273954323">

An easy example, I can pull the line containing the string. If I knew where the sring would be each time in the line I could grab it, but since it's random... i'm lost. Could someone help me expand on this: 
#!/usr/bin/perl

my $data_file = '/home/resources.xml';
my $data_out = '/home/out.log';
open DATA, "$data_file" or die "can't open $data_file $!";
open DATA_OUT, ">>$data_out";
my @array_of_data = <DATA>;


foreach my $line (@array_of_data)
{

     if ($line =~ m/authDataAlias=.*-.*-.*_DM/i)
        {
        print DATA_OUT "$line\n";
        }
}

close (DATA);
close (DATA_OUT);

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In reply to Need Some help with finding a word in a file by was6guy

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