Low order hashes
schveiguy at gmail.com
Wed Jan 2 15:00:50 UTC 2019
On 1/1/19 2:40 PM, Michelle Long wrote:
> I need to hash a few strings to a byte, short, or int. hashOf works for
> int only on x86.
> What would be a nice way to accomplish this? Collisions are not good but
> not catastrophic. Mainly I need a unique ID to emulate enums. I might
> just chop off the extra bits or mash them up somehow and it will
> probably work but hoping for something more solid.
Not from experience, but just thinking out loud, you could take the int
and xor the parts together.
in other words:
auto x = hashOf(y);
ushort realHash = (x ^ (x >> 16)) & 0xffff;
ubyte would be 4 terms, but still not too bad.
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