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If I'm understanding you correctly, you're interested in finding all items in the first file that are not in the second file. If this is the case, List::Compare can assist you with this:

use strict; use warnings; use File::Slurp qw/read_file/; use List::Compare; chomp( my @a_file = read_file 'a_file.txt' ); chomp( my @b_file = read_file 'b_file.txt' ); my @a_file_only = List::Compare->new( \@a_file, \@b_file )->get_Lonly; print "$_\n" for @a_file_only;

Output on your data sets:

Hope this helps!

In reply to Re: Compare two txt files and print the difference between the two files. by Kenosis
in thread Compare two txt files and print the difference between the two files. by Anonymous Monk

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