Would this (untested!) not work? 

use 5.14.2;
use strict;
use warnings;

use XML::RSSLite;
use LWP::Simple;

my @keywords = qw(approach);

my @URLlist = ( 
 'http://www.theguardian.com/theguardian/mainsection/rss',
 'http://www.theguardian.com/theguardian/mainsection/rss1', 
);

foreach my $URL ( @URLlist ) {
  my $content = get($URL);

  my %result;
  parseRSS(\%result, \$content);

  my $re = join "|", @keywords;
  $re = qr/\b(?:$re)\b/i;

  foreach my $item (@{ $result{items} }) {
    my $title = $item->{title};
    $title =~ s{\s+}{ };  
    $title =~ s{^\s+}{  }; 
    $title =~ s{\s+$}{  };

    if ($title =~ /$re/) {
      print "$title\n\t$item->{link}\n\n";
    }
  }
}

[download]

In reply to Re: Parsing multiple RSS files by atcroft
in thread Parsing multiple RSS files by perl.j

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.