Hello Fellow Perlmonks

I have a medium sized text file, which I would like to index along with line number so that I can find where a word is in a file. I have already written some code, which is appended, however I was wondering if there were any good plain text indexers in Perl that also store where in a file a particular word is. I have looked at Apache Lucene. The only problem that I have with it is that it does not store where in a file a particular word is only that the word is in the file. I could use the find feature in whatever text editor I use but I would like to be able to search for a term over several files.

I have also looked at two nodes here and and here.

Any ideas?

UPDATE: I have updated the code a bit since I was not stripping the unwanted characters before I did some other things to the text.

use strict;
use warnings;

use utf8;
use IO::File;

#the file to index
my $inFile = "c:\\temp\\texts\\T100001A.txt";

#the file to store the index information
my $indexFile = "c:\\temp\\index\\t100001a.index";

my $inFh = new IO::File $inFile, "r";
my $outFh = new IO::File "$indexFile", "w";
my $lineNum = 0;

my %index;

while(my $line = <$inFh>) {
    $lineNum++;

    chomp $line;

    my @words = split /\s/, $line;

    foreach my $word (@words) {
    $word =~ s/,$|\.$|\[|\]|\(|\)|;|:|!//g;
    $word = lc $word;
    }

    @words = grep {!&inStopList($_);} @words;
    @words = grep {&removeNullEntries($_);} @words;

    foreach my $word (@words) {
    if(exists $index{$word}) {
        push @{$index{$word}}, $lineNum;
    } else {
        my @lineNums;

        push @lineNums, $lineNum;
    
        $index{$word} = \@lineNums;
    }
    }
}

print "done indexing\n";

foreach my $key (keys %index) {
    print $outFh $key;
    print $outFh "=";
    print $outFh join(',', @{$index{$key}});
    print $outFh "\n";
}

sub inStopList {
    my $word = shift;
    my @stopList = ("the", "a", "an", "of", "and", "on", "in", "by", "
+with", "at", "he", "after", "into", "their", "is", "that", "they", "f
+or", "to", "it", "them", "which");

    foreach my $stopWord (@stopList) {
    if($word eq $stopWord) {
        return $word;
    } elsif($word =~ /p\.(\d)+/) {
        return $word;
    } elsif($word =~ /\-{5,}?/) {
        return $word;
    } else {
        next;
    }
    }
}

sub removeNullEntries {
    my $word = shift;

    if($word) {
    return $word;
    } else {
    return undef;
    }
}
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