Re: Comparing Two Files

Read each file into the following structure

my %file1_hosts = (
   bobssite => {
      'bobssite.autossl.net' => 1,
      'www.bobssite.com'     => 1,
      'bobssite.dealer.net'  => 1,
   },
   billssite => {
      'billssite.autossl.net'  => 1,
      'www.billssite.com'      => 1,
      'www.billsothersite.com' => 1,
      'bobssite.dealer.net'    => 1,
   },
);
[download]

Then you can easily compare the two files.

sub compare_aliases {
   my ($host, $file1_aliases, $file2_aliases) = @_
   my %aliases = map { $_ => 1 }
      keys(%$file1_aliases),
      keys(%$file2_aliases);
   for my $alias (keys(%aliases)) {
      if (!$file1_aliases->{$alias}) {
         ...
      }
      elsif (!$file2_aliases->{$alias}) {
         ...
      }
   }
}

sub compare_hosts {
   my ($file1_hosts, $file2_hosts) = @_
   my %hosts = map { $_ => 1 }
      keys(%$file1_hosts),
      keys(%$file2_hosts);
   for my $host (keys(%hosts)) {
      if (!$file1_hosts->{$host}) {
         ...
      }
      elsif (!$file2_hosts->{$host}) {
         ...
      }
      else {
         compare_aliases($host,
            $file1_hosts->{$host},
            $file2_hosts->{$host},
         );
      }
   }
}

compare_hosts(\%file1_hosts, \%file2_hosts);
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Update: Small bug fixes.

Comment on Re: Comparing Two Files Select or Download Code

Replies are listed 'Best First'.
Re^2: Comparing Two Files by happy.barney (Friar) on Jul 01, 2010 at 09:59 UTC
different approach (just idea): `# load files into alias => id pairs: my $file1 = { 'bobssite.autossl.net' => 'bobssite', ... }; my $file2 = { ... }; my @different_aliases = grep exists $file1->{$_} and $file1->{$_} ne $ +file2->{$_}, keys %$file2; delete $file1{keys %$file2}; my @aliases_not_in_file2 = keys %$file1; my @ids_not_in_file2 = do { my %tmp; @tmp{values %$file1} = values %$file1; keys %tmp; };` [download]	[reply] [d/l]

Replies are listed 'Best First'.

Re^2: Comparing Two Files
by happy.barney (Friar) on Jul 01, 2010 at 09:59 UTC


# load files into alias => id pairs:
my $file1 = {
  'bobssite.autossl.net' => 'bobssite',
  ...
};

my $file2 = { ... };

my @different_aliases = grep exists $file1->{$_} and $file1->{$_} ne $
+file2->{$_}, keys %$file2;

delete $file1{keys %$file2};

my @aliases_not_in_file2 = keys %$file1;
my @ids_not_in_file2 = do {
  my %tmp;
  @tmp{values %$file1} = values %$file1;

  keys %tmp;
};
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