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Re: Compare two txt files and print the difference between the two files.

by Kenosis (Priest)
on Feb 01, 2013 at 18:25 UTC ( #1016597=note: print w/replies, xml ) Need Help??


in reply to Compare two txt files and print the difference between the two files.

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:

http://www.ok.com/test_1234.html http://www.ok.com/test_error.html

Hope this helps!

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[erix]: in this context, one learns all kinds of interesting psychological excuse-jargon: not just 'alternative facts'; how about 'gapped knowledge' ? :)
[erix]: which still manages to sound more or less positive
[Corion]: Huh. I wasn't aware that you cannot segregate Python 2 and Python 3 modules... Hopefully Perl 6 module use C6AN and thus avoid the problem...
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[moritz]: there are already some (very few) Perl 6 modules on CPAN, but in a way that the p5 indexer avoids them

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