I need to use tied hashes for save my RAM. Tried to use module MLDBM because uusing of nested data structures, but there is one problem. Used keys contains unicode characters. If I want to get list of preset keys and use @mykeys = keys %data; the returned key names probably somewhere loose their unicode flag. Here is samle code

#!/usr/bin/perl_parallel -w
# For Emacs: -*- mode:cperl; mode:folding; coding:utf-8; -*-

use strict;
use utf8;
use DB_File;
use MLDBM qw (DB_File Storable);         # ) 
use Fcntl;

my $dbfile = 'database.utf';
my %data = ();

tie ( %data, 'MLDBM', $dbfile, O_CREAT | O_RDWR, 0666, $DB_BTREE ) || 
+die $!;

open DATA, '<:utf8', 'input.utf8' or die $!;
while (<DATA>) {
  chomp;
  my ($key, $value) = split(':', $_, 2);
  $data{$key} = $value;
}
close DATA;
print join(', ', keys %data), "\n";

exit 0;

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I have idea to use use Encode; and replace keys %data with map { encode('utf8', $_) } keys %data, but is it the right way? or am I missed something? Any suggestions?

In reply to DBM modules and unicode keys by ph0enix

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