Hi Monks, I would like to convert a array of hash ref to hash and check a value in it. This is how it goes. The following code gets the array reference in $ams_hosts 

 my $ams_hosts = $request->get_config()->get_ams_hosts($domain);

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The following code 
print STDERR Dumper @{$ams_hosts};

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prints this 
$VAR1 = {
          'domainId' => '1',
          'deviceIp' => '172.16.133.56',
          'deviceType' => 3,
          'deviceName' => 'AMS'
        };
$VAR2 = {
          'domainId' => '1',
          'deviceIp' => '172.16.133.57',
          'deviceType' => 3,
          'deviceName' => 'ams_57'
        };

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Now i would like to check if a scalar variable, say $ams_ip=172.16.133.52, does not exist in the above hash assign undef to $ams_ip. I thought of assigning the array to hash with (key,value) as (deviceIp,<its correspponding ip address like 172.16.133.56> ) I tried the following snippet 
my %ams_ips_hash = map {$_->{'deviceIp'}++} @{$ams_hosts};
$ams_ip = "" if !exists $ams_ips_hash{ $ams_ip};

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but it doesnt work. Please let me know what I am doing wrong and what would make it right. As I am new to perl, I would be obliged to learn from perl monks like you. Your help is highly appreciated. Thanks in advance :) .

In reply to Converting array of hash references to hash by anirudh.agarwal

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