I am beginning perl user, so I'm sorry in advance if I miss some easy things, but I cannot get it to work and I am not sure whether every step is necessary(I have problems in particular with the while loops and 'saving' its outcome). I would like to do the following:

I have two text files. File 1 with a word list (one word per line) and File 2 that is a regular text document with text and numbers. I would like to count the number of words in file 2 that I can also find in file 1 and the total number of words in the document (so that I can calculate the percentage of corresponding words)

this is how far I have come:

use strict;
use warnings;

#Part one of the code, the wordlist is a file with one word per line a
+nd I transform this into a hash

    my $filename = "wordlist.txt";
    open(INPUT, $filename) or die "Cannot open $filename";

    my $line = <INPUT>;
    while($line = <INPUT>){
    chomp($line);
    my @words = split(/\s+/, $line);
    
my %unique = map {$_ => 1 } @words;
my @unique = %unique;

#part two of code, open the text file and extract words only (because 
+the file also includes many numbers), and count the number of occuren
+ce stored in a hash

open (DATA, "4.txt") or die;

my @UnNum;
my $x;
my %dict;

while (<DATA>) {
    chomp;
      $_ = lc;   
      s/ -- / /g; 
      s/ - / /g; 
      s/ +/ /g;   
      s/[.,:;?"!_()\[\]]//g; 
  
   my @UnNum = split(/\s+/);

foreach $x(@UnNum){
if ($x =~  /(([a-zA-Z']+-)*[a-zA-Z']+)/ ){
    ++$dict{$x};
}}}

#part 3 of the code, I try to compare the two different hashes and add
+ the total number of occurrences

while ((my $words,my $number) = each (%dict))
{my $total+= $number; 
if (exists($unique{$words})){
my $corresponding +=$number;

print "There are $corresponding corresponding words of in total $total
+ words";}}

}

[download]

thank you in advance for the help!

In reply to count number of overlapping words in a document by dmarcel

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