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SubstrHash (3)
  • >> SubstrHash (3) ( Solaris man: Библиотечные вызовы )
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    NAME

         Tie::SubstrHash - Fixed-table-size, fixed-key-length hashing
    
    
    

    SYNOPSIS

             require Tie::SubstrHash;
    
             tie %myhash, 'Tie::SubstrHash', $key_len, $value_len, $table_size;
    
    
    
    

    DESCRIPTION

         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
         $table_size elements will result in a fatal error, as will
         efforts to store a value not exactly $value_len characters
         in length, or reference through a key not exactly $key_len
         characters in length. While these constraints may seem
         excessive, the result is a hash table using much less
         internal memory than an equivalent freely-allocated hash
         table.
    
    
    

    CAVEATS

         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.
    
    
    
    


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