Michael Glaesemann wrote:
> On Sep 6, 2007, at 10:53 , Mark Mielke wrote:
>> I don't like the truncating hash suggestion because it limits the
>> ability of a hash code to uniquely identify a key.
> AIUI, a hash can't be used as a unique identifier: it always needs to
> be rechecked due to the chance of collisions. There might be other
> issues with truncation, but preventing hashes from being unique isn't
> one of them.
Of course - that's why I used the word "limit".
Hash works best, when the key is unique, however. A 32-bit hash will be
many powers of 2 more unique than a 8-bit hash.
Cheers,
mark
--
Mark Mielke <mark@mielke.cc>