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Reference of hash (Perl)

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Top Forums Shell Programming and Scripting Reference of hash (Perl)
# 1  
Old 01-22-2013
Reference of hash (Perl)
Hi Perl users,

Could somebody help me to find the solution of my problem below.
Here is my data:
Code:
__DATA__
===================================================
NameOfipaddress                       ippair_1
propertiesx                           y
propertiesy                           x
ipAddress_1                           192.168.200.1
ipAddress_2                           192.168.200.2 
===================================================
NameOfipaddress                       ippair_2
propertiesx                           y
propertiesy                           x
ipAddress_1                           192.168.200.3
ipAddress_2                           192.168.200.4

Here is the expected result of the code:
Code:
__EXPECTED_RESULT__
FIRST_IP_PAIR
NameOfipaddress : ippair_1       
ipAddress_1     : 192.168.200.1  
ipAddress_2     : 192.168.200.2 

SECOND_IP_PAIR
NameOfipaddress : ippair_2
ipAddress_1     : 192.168.200.3
ipAddress_2     : 192.168.200.4

Here is my code and the unexpected result:

Code:
LINE:while (my $line = <FH>){
         chomp ($line);
         if ($line =~ m/^(NameOfipaddress)\s*(.*)/){
           push @{$datalog{'IP'}{$1}}, $2;
           next;
         }
         if ($line =~ m/^(ipAddress_1)\s*(.*)/){
           push @{$datalog{'IP'}{$1}}, $2;
           next;
         }
         if ($line =~ m/^(ipAddress_2)\s*(.*)/){
           push @{$datalog{'IP'}{$1}}, $2;
           redo LINE if ($line =~ m/^(NameOfipaddress)\s*(.*)/);
         }
     }
     
foreach my $key (sort keys %{$datalog{'IP'}}){
   print "$key: @{$datalog{'IP'}{$key}}";
   print "\n";
}     

__UNEXPECTED_RESULT(my code result)__
NameOfipaddress : ippair_1       ippair_2
ipAddress_1     : 192.168.200.1  192.168.200.3
ipAddress_2     : 192.168.200.2  192.168.200.4

# 2  
Old 01-22-2013
You need to store the data structure a little differently. To know, how it is done in this, just uncomment the line "print Dumper \%datalog".

Code:
#!/usr/bin/perl
use strict;
use warnings;
use Data::Dumper;

$\="\n";

my $curr_pair="";
my $ipadrnm="";
my %datalog;
LINE:while (my $line = <DATA>){
         chomp ($line);
         if ($line =~ m/^(NameOfipaddress)\s*(.*)/){
           $datalog{'IP'}{$2}={ };
           $curr_pair=$2;
           next;
         }
         if ($line =~ m/^(ipAddress_1)\s*(.*)/){
           $datalog{'IP'}{$curr_pair}{$1}=$2;
           next;
         }
         if ($line =~ m/^(ipAddress_2)\s*(.*)/){
           $datalog{'IP'}{$curr_pair}{$1}=$2;
           redo LINE if ($line =~ m/^(NameOfipaddress)\s*(.*)/);
         }
     }

#print Dumper \%datalog;
my $cnt=1;
foreach my $ipname (sort keys%{$datalog{IP}}){
        print 'IP_PAIR : ', $cnt++;
        print "NameofIpAddress : $ipname ";
        foreach my $ipadr (keys%{$datalog{IP}{$ipname}}){
                print "$ipadr : $datalog{IP}{$ipname}{$ipadr} ";
        }
        print "";
}

On running this:

Code:
IP_PAIR : 1
NameofIpAddress : ippair_1
ipAddress_1 : 192.168.200.1
ipAddress_2 : 192.168.200.2

IP_PAIR : 2
NameofIpAddress : ippair_2
ipAddress_1 : 192.168.200.3
ipAddress_2 : 192.168.200.4

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