RE: Shift and "=>"

[Lorne Easton]

Hi,

Below is some example code that I have butchered to
it's simplest impelmentation.

I don't understand this line..

$session = Net::SNMP->session(-hostname => "10.0.0.100", -community =>
"public");

Particularly, the way data is presented to the function..

I.E : -data => "text"

Is this some special type of data type?? What does the "=>" signify.

Also, why the use of the "shift" as in:
(from the original example)

   ($session, $error) = Net::SNMP->session(
      -hostname  => shift || '10.0.0.100',
      -community => shift || 'public',
      -port      => shift || 161
   );

and how can you use
"||" with it. I thought it was used like.

open(INPUT,"<$file") ||
        die "Error";

being equivalent of:

if !(open(INPUT,"<$file") {
die "Error; }

I apologise for the newbie questions, I am just unable to
find info on this in the beginner docs and the like..

Thanks in advance for your assistance

Cheers,
Lorne

--- SNIP ---

  use Net::SNMP;

  $session = Net::SNMP->session(
      -hostname  => "10.0.0.100",
      -community => "public",);


  my $sysUpTime = '1.3.6.1.2.1.1.3.0';

  $response = $session->get_request($sysUpTime);

  print ($response->{$sysUpTime});

  $session->close();
  exit 0;




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