Greetings. I came up with this today to be able to retrieve a topic based on keyword. There will not be more more than a few hundred topics, each with a keyword or two. Can anyone suggest a better way?

#!/usr/bin/perl

use strict;
use warnings;
use feature 'say';
use Data::Dumper;

# TODO turn into yml as an external file.
my @index = (
   {
      keywords => [ qw/ emacs cfengine_el / ],
      topic    => "Cfengine_el is an EMACS plugin to edit your CFEngin
+e ".
         "code: ".
         "https://github.com/cfengine/core/blob/master/contrib/cfengin
+e.el",
   },
   {
      keywords => [ 'best practices' ],
      topic    => "CFEngine best practices: ".
         "http://evolvethinking.com/category/cfengine/best-practices/"
+.
         "and https://github.com/atsaloli/cf-health-check",
   },
);

my %topic;
my %keyword;
my $i = 0;

# Build a fast index for keyword searches
for my $next_topic ( @index ) {

   # Store topic in index.
   $topic{$i} = $next_topic->{topic};

   for my $next_keyword ( @{ $next_topic->{keywords} } ) {

         # Store keyworkd in index.
         $keyword{$next_keyword} = $i;
   }
   $i++;
}

say Dumper( \%topic );
say Dumper( \%keyword );
say 'topic for keyword "best practices" is '
   . $topic{ $keyword{ 'best practices' } };
[download]

Running it:

$VAR1 = {
          '0' => 'Cfengine_el is an EMACS plugin to edit your CFEngine
+ code: https://github.com/cfengine/core/blob/master/contrib/cfengine.
+el',
          '1' => 'CFEngine best practices: http://evolvethinking.com/c
+ategory/cfengine/best-practices/and https://github.com/atsaloli/cf-he
+alth-check'
        };

$VAR1 = {
          'emacs' => 0,
          'cfengine_el' => 0,
          'best practices' => 1
        };

topic for keyword "best practices" is CFEngine best practices: http://
+evolvethinking.com/category/cfengine/best-practices/and https://githu
+b.com/atsaloli/cf-health-check
[download]