Tie::SubstrHash - Fixed-table-size, fixed-key-length hashing
tie %myhash, 'Tie::SubstrHash', $key_len, $value_len, $table_size;
The Tie::SubstrHash package provides a hash-table-like interface to an array of determinate size, with constant key size and record size.
Upon tying a new hash to this package, the developer must specify the
size of the keys that will be used, the size of the value fields that the
keys will index, and the size of the overall table (in terms of key-value
pairs, not size in hard memory). These values will not change for the
duration of the tied hash. The newly-allocated hash table may now have
data stored and retrieved. Efforts to store more than
Because the current implementation uses the table and key sizes for the hashing algorithm, there is no means by which to dynamically change the value of any of the initialization parameters.