in reply to Array::Compare issues

Would a simple set difference suffice? 
@ARGV = qw(file1 file2);
my %found_in;
while (<>) {
  $found_in{$_} .= $ARGV;
}
print "file1 and not file2:\n";
print grep { $found_in{$_} eq "file1" }, keys %found_in;
print "file2 and not file1:\n";
print grep { $found_in{$_} eq "file2" }, keys %found_in;

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-- Randal L. Schwartz, Perl hacker
Be sure to read my standard disclaimer if this is a reply.

Replies are listed 'Best First'.
Re: &bull;Re: Array::Compare issues
by sunadmn (Curate) on Oct 06, 2003 at 14:06 UTC
    Merlyn, I will take a poke at that one thanks for the advice this does seem much simpler than the method I was going about with. Thanks a million -Sunadmn
[reply]
Re: &bull;Re: Array::Compare issues
by sunadmn (Curate) on Oct 06, 2003 at 17:09 UTC
    Merlyn I have tested your sample code and I am now having an issue that I return no data. I would assume this should be returned to STDOUT but when ran like so
    [root@nscache2 tmp] 115# ./compare1.pl db.bind1 db.bind2
file1 and not file2:
file2 and not file1:
[root@nscache2 tmp] 116#

    [download]
    I see nothing returned. Do you have any idea as to why this might be?? Here is my new code:
    #!/usr/bin/perl -w

use strict;

# shift(@ARGV);
my %found_in;
while (<>) {
#  $found_in{$_} .= $ARGV;
   $found_in{$_}{$ARGV}++;
}
print "file1 and not file2:\n";
print grep { $found_in{$_} eq "file1" } keys %found_in;
print "file2 and not file1:\n";
print grep { $found_in{$_} eq "file2" } keys %found_in;

exit;

    [download]
    Thanks in advanced for any help. -Sunadmn
[reply]
[d/l]
[select]
      Yes, my example specifically uses $ARGV, which will be sensitive to the names of the files being processed. Either rename your files to be file1 and file2, or change the strings in the two greps.

      -- Randal L. Schwartz, Perl hacker
      Be sure to read my standard disclaimer if this is a reply.

[reply]
        Thanks Merlyn that did the trick just fine. -Sunadmn
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