Re^3: scalable duplicate file remover

[jwkrahn]

1. From the documentation for Digest::SHA1:
   
       $sha1->addfile($io_handle)
   [ SNIP ]
           In most cases you want to make sure that the $io_handle is in "binmode" before you pass it as argument to the addfile() method.
   
   
2. OK.    :-)
   
   
3. Typeglobs and Filehandles
   How do I pass filehandles between subroutines?
   How can I use a filehandle indirectly?
   
   
4. $sha1->digest returns a digest in binary form while $sha1->hexdigest is in hexadecimal form. For example:
   
   $ perl -le'
   my $digest     = "\x02\x07\xFA\x78";
   my $hex_digest = "0207FA78";
   print for length( $digest ), length( $hex_digest );
   '
   4
   8
   
   
5. Update: reset() may or may not speed things up. You would have to compare both methods with Benchmark to be sure.