in reply to
Re^3: Database storage confusion
in thread Database storage confusion
# I've never really used a dbm.
# They allow complicated structures, right?
$dbm{$name}{'age'} = 29;
Well, some do, and some dont...
MLDBM certainly does, though your syntax wont work. Quoting from the
pod:
Adding or altering substructures to a hash value is
not entirely transparent in current perl. If you want
o store a reference or modify an existing reference
value in the DBM, it must first be retrieved and
stored in a temporary variable for further
modifications. In particular, something like this
will NOT work properly:
$mldb{key}{subkey}[3] = 'stuff'; # won't work
Instead, that must be written as:
$tmp = $mldb{key}; # retrieve value
$tmp->{subkey}[3] = 'stuff';
$mldb{key} = $tmp; # store value
This limitation exists because the perl TIEHASH
interface currently has no support for
multidimensional ties.
-Blake
