Here is some working code to get you started: 
use strict;
use warnings;
use Data::Dumper;
       
my @colNames;
my %all;

# Collect server info
while (<DATA>){
  my @col = split /,/;

  for my $c(@col){
      $c =~ s/^\s+//; # Strip Leading white space
      $c =~ s/\s+$//; # Strip trailing white space
  }
  if ($col[0] eq "id"){      
      @colNames = @col;
      next;
  }
  my %info;
  @info{@colNames} = @col; # Fill the hash, using slice
  next unless $info{id} ; # ignore lines without valid ID
  $all{ $info{id} } = [@col]; # Save each row
}
# Print server info
Print_Server_Info (21);
Print_Server_Info (22);

my $l = find_by_kwd ("post", "perl programmer");
print "Programmer is ID# $l\n";
#--end of program --

sub Print_Server_Info{
   my $id = shift @_;
     my %info;
    @info{@colNames} = @{ $all{$id} }; # Fill the hash, using slice   
+                 
    print "Info for ID=$id:\n" . Dumper \%info;
}

sub find_by_kwd{
   my ($name, $value)=@_;
   for my $id (keys %all){
        my %info;
        @info{@colNames} = @{ $all{$id} }; # Fill the hash, using slic
+e    
        return $id if $info{ $name } eq $value;
   }
   return undef; # Not found
}
__DATA__
id ,name,sal,post,income,country ,address..$#number_of_columns
21,hhdh,23,lawyer,0,US,GA,XYZ...$#number_of_rows
22,shjhds,24,perl programmer,999999999999,US,TX,XYZ..$#number_of_rows

[download]
Output: 
Info for ID=21:
$VAR1 = {
          'country' => 'US',
          'sal' => '23',
          'post' => 'lawyer',
          'name' => 'hhdh',
          'id' => '21',
          'income' => '0',
          'address..$#number_of_columns' => 'GA'
        };
Info for ID=22:
$VAR1 = {
          'country' => 'US',
          'sal' => '24',
          'post' => 'perl programmer',
          'name' => 'shjhds',
          'id' => '22',
          'income' => '999999999999',
          'address..$#number_of_columns' => 'TX'
        };
Programmer is ID# 22

[download]
Update: Added FIND code.

     Syntactic sugar causes cancer of the semicolon.        --Alan Perlis

In reply to Re: hash of hash by NetWallah
in thread hash of hash by luckysing

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