I put together this quick test and it seems to work as expected (I'm using perl : 5.005_02) 
#!/usr/bin/perl -w

 use Fcntl;
 use SDBM_File;

 my %db;
 tie (%db, 'SDBM_File', './t.db', O_RDWR | O_CREAT, 0666);

 my $s=scalar keys (%db);
 print "s=$s\n";
 $db{39485}=1;
 $db{354345}=1;

 $s=scalar keys (%db);
 print "s=$s\n";
 foreach (keys %db){
  print "  \"$_\"\n";
 }
 untie %db;

[download]
producing the following output 
s=0
s=2
  "39485"
  "354345"
What are you tying to? Maybe there's a problem there.


Les Howard
www.lesandchris.com
Author of Net::Syslog and Number::Spell

In reply to Re: Whither the truth of a tied hash? by lhoward
in thread Whither the truth of a tied hash? by mojotoad

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