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Re^3: file comparison

by ramlight (Friar)
on Jun 26, 2009 at 20:13 UTC ( #775165=note: print w/replies, xml ) Need Help??


in reply to Re^2: file comparison
in thread file comparison

Yes. You just have to feed the appropriate file names to the fc command and look at what it gives you back. It so happened that I was comparing two shares to see where they differed, not quite the same as your problem ... but close enough.

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Re^4: file comparison
by Karger78 (Beadle) on Jun 26, 2009 at 20:29 UTC
    I decided to do it the md5 way. So how would i accomplish this. I have it reading the directorys assign it to an array. Right now I am just printing the md5 hash from each element in the array. How would I assign each item to the array, and then loop though each array and compare each field?
    opendir(DIR, $RemoteSubDirectory); my @rFileCheck = readdir(DIR); closedir(DIR); opendir(DIR, $localCpPath); my @lFileCheck = readdir(DIR); closedir(DIR); my $c1; foreach (@lFileCheck) { print md5_base64($lFileCheck[$c1]); print "\n"; $c1++; } my $c2; foreach (@rFileCheck) { print md5_base64($rFileCheck[$c1]); print "\n"; $c2++; }
      Let's back up a minute and think about the problem.

      To do the comparison, you need
      - the file to be compared (file_a)
      - the file to compare with (file_b)
      - a method of doing the comparison

      Given two lists of files (@file_a) and (@file_b), then you just need to take one from column a and one from column b, apply the comparision method, and check the result. For example you could:

      $fa = shift(@file_a); $fb = shift(@file_b); if (digest($fa) == digest($fb)) # digest=whatever method you prefer # use eq instead of == if digest retur +ns a string { # files match }
      So you have two separate problems: first generating the two lists of files so that the appropriate files match up in each list, then doing the proper digest.

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