in reply to Re^2: Creating Multidimensional Hashed Arrays?
in thread Creating Multidimensional Hashed Arrays?

Maybe you want to structure your data as a HASHES OF HASHES, with the keys being the VLAN number (if they are unique), then you can sort by keys and print the data: 
use warnings;
use strict;

my %vlan_nums = (
        112 => {
                name        => "JP-WIRELESS",
                description => "JP-WIRELESS",
                ip          => "192.168.207.1",
                mask        => "255.255.255.0"
            },
        2113 =>
            {
                name        => "JP-IDF1-DATA",
                description => "JP-IDF1-DATA",
                ip          => "10.136.113.1",
                mask        => "255.255.255.0"
            }
);

for my $num (sort keys %vlan_nums) {
    print <<EOF;
VLAN number     : $num
VLAN name       : $vlan_nums{$num}{name}
VLAN description: $vlan_nums{$num}{description}
VLAN ip         : $vlan_nums{$num}{ip}
VLAN mask       : $vlan_nums{$num}{mask}

EOF
}

[download]

Which prints out: 

VLAN number     : 112
VLAN name       : JP-WIRELESS
VLAN description: JP-WIRELESS
VLAN ip         : 192.168.207.1
VLAN mask       : 255.255.255.0

VLAN number     : 2113
VLAN name       : JP-IDF1-DATA
VLAN description: JP-IDF1-DATA
VLAN ip         : 10.136.113.1
VLAN mask       : 255.255.255.0

[download]

Data::Dumper is also handy for displaying Perl data structures.

Replies are listed 'Best First'.
Re^4: Creating Multidimensional Hashed Arrays?
by spickles (Scribe) on Aug 28, 2009 at 02:48 UTC
    toolic -

    You nailed it. I was reading the perl doc you linked for a couple of hours before posting, so I was on the right track. But decoding all of those parenthesis, brackets, commas, etc. can get confusing quickly. So now my question would be how to add a new vlan?

[reply]
      to add a new vlan assuming vlan number is unique 
      unless (exists $vlan_nums{$new_num}){
$vlan_nums{$new_num}{name} = xyz;
....
}

      [download]
      If update is needed for the existing number you can add an else loop
[reply]
[d/l]

        The following code, taken from here, worked for me!

        # Either build your data as a hashref
my $hashref = {
  username => someusername,
  etc => ...,
};

# or assign a reference to a hash
my %data = (username => someusername, etc => ...);
my $hashref = \%data;

# Then pass it off
my $valid = verify($hashref);
# You can also pass like so
my $valid = verify(\%data);

# Then, in your verify sub:

sub verify {
  my $ref = shift;
  
  # do something with your data
  $ref->{'username'} =~ /yourregex/;

  return $something;
}

        [download]
[reply]
[d/l]

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