I am using XML::LibXML to parse a simple XML site. This issue I am running into is the following

Operation "+": no method found,
    left argument in overloaded package XML::LibXML::NodeList,
    right argument has no overloaded magic at check_server_room_temp l
+ine 13.

[download]

I am assuming it is because the getElementsByTagName wants an array but in my case there is only ever going to be 1 tag I am looking for. I've read through the documentation but find my self a little lost.

Here's the test code in question 

#!/usr/bin/perl

use warnings;
use strict;
use LWP::Simple;
use XML::LibXML;

my $url = 'http://192.168.1.8/xmlfeed.rb';
my $parser = XML::LibXML->new;
my $doc = $parser->parse_file($url);
my $temp = $doc->getElementsByTagName('currentReading');

my $math = $temp + 5;
print $math;

[download]
Simply printing out the variable temp properly prints the value I am looking for but does not allow me to run any conditional checks on it.
Here's the XML it's reading
<currentConditions>
    <deviceName>Storm</deviceName>
    <readingDateTime>02/26/2016 14:57:07</readingDateTime>
    <tempUnits>Fahrenheit</tempUnits>
    <form>1T</form>
    <ports>
        <port number="1" name="Port 1">
            <condition type="temperature">
                <currentReading>73.0</currentReading>
                <highLimit>85</highLimit>
                <lowLimit>10</lowLimit>
                <alarmStatus>0</alarmStatus>
                <prevAlarmStatus>0</prevAlarmStatus>
            </condition>
        </port>
    </ports>
    <errorReadingSensor>0</errorReadingSensor>
</currentConditions>

[download]
As always I appreciate the assistance.



Update ----
I may of found a solution but would still like to see if there is a cleaner way of accomplishing this task. I have done the following.

#!/usr/bin/perl

use warnings;
use strict;
use LWP::Simple;
use XML::LibXML;

my $url = 'http://192.168.1.8/xmlfeed.rb';
my $parser = XML::LibXML->new;
my $doc = $parser->parse_file($url);
my @temp = $doc->getElementsByTagName('currentReading');

foreach(@temp){
    my $temp = $_->to_literal;
    my $math = $temp + 5;
    print $math;
}

[download]

It would be nice to just get the value without looping especially when I know there is only ever 1 value

In reply to Quick XML::LibXML question by edimusrex

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