Not able to retrieve hash value outside the function

aniammu has asked for the wisdom of the Perl Monks concerning the following question:

I have a requirement where in i have a lab page and need to retrieve the value of lab name and ip address. My code is as below


#!/usr/bin/perl -w


use LWP::UserAgent;
use HTTP::Request;
use HTML::TableExtract;
$ENV{PERL_LWP_SSL_VERIFY_HOSTNAME} = 0;
require 'dumpvar.pl';

my $ua = LWP::UserAgent->new(timeout => 10);
my $url = 'https://<link for lab page>';
my $request = HTTP::Request->new('GET',$url);
my $response = $ua->request($request);
our %hash = ();


if ($response->is_success){
    our $te = new HTML::TableExtract( headers => ['Hostname','IP'] );
    $te->parse($response->content);
    foreach our $ts ($te->table_states) 
    {
        print "The value of ESXI hosts \n";
        foreach our $row ($ts->rows) 
        {
            print  (join("\t", @$row)."\n");
            %hash=@$row;
        }
    }
} else {
    print "Error: ".$response->status_line."\n";
}

while (($key, $value) = each(%hash))
{
        print "Key : $key & value : $value\n";
}
[download]

I am getting below output


#aniammu>perl withLWP.pl
Parsing of undecoded UTF-8 will give garbage when decoding entities at
+ C:/Perl64/lib/HTML/TableExtract.pm line 204.
The value of ESXI hosts
esx1  0.0.1.1
esx2  1.1.1.1
esx3  2.2.2.2
Key : esx3 & value : 2.2.2.2

#aniammu>
[download]

Actually my requirement is to fetch the all the esx names and ip's

Pls help me to resolve this issue. My Current output is as below


Key : esx3 & value : 2.2.2.2
[download]

Required output

Key : esx1 & value : 0.0.1.1
Key : esx2 & value : 1.1.1.1
Key : esx3 & value : 2.2.2.2
[download]

Comment on Not able to retrieve hash value outside the function Select or Download Code

Replies are listed 'Best First'.
Re: Not able to retrieve hash value outside the function by Corion (Patriarch) on Dec 21, 2015 at 10:22 UTC
With the following line, you overwrite all contents of `%hash`: `%hash=@$row;` [download] Most likely, you only wanted to add a single key/value pair to the hash? `my( $key, $value ) = @$row; $hash{ $key } = $value;` [download]	[reply] [d/l] [select]
Re^2: Not able to retrieve hash value outside the function by Anonymous Monk on Dec 22, 2015 at 04:21 UTC
Thank you . The code suggested by you worked as per my requirement.	[reply]
Re: Not able to retrieve hash value outside the function by Preceptor (Deacon) on Dec 21, 2015 at 10:23 UTC
Your problem is this line: `%hash=@$row;` [download] It _overwrites_ the hash with the current row, and is why you only have the last value. You should probably instead: `my ( $host, $ip ) = @$row; %hash{$host} = $ip;` [download] I think that should do the trick	[reply] [d/l] [select]
Re^2: Not able to retrieve hash value outside the function by aniammu (Novice) on Dec 22, 2015 at 04:22 UTC
Thank you . The code suggested by you worked as per my requirement.	[reply]