On Nov 4, 2009, at 2:49 PM, Allen Wirfs-Brock wrote:
A straw man proposal for Harmony encapsulated hash codes has been posted to the Wiki athttp://wiki.ecmascript.org/doku.php?id=strawman:encapsulated_hashcodes
1) Wouldn't it be simpler to have a single Object.hash() function that returns a uniformly distributed number in the 0..2^32 range, and leave the mod operation up to code using the hash code? Making a new function that (essentially) encapsulates the hash operation and the mod does not seem to pull its weight in API complexity.
2) What about non-objects? It would be nice if strings, numbers, and perhaps other primitive types could hash by value rather than by identity, so you could reasonably mix them as hash keys with objects.
3) Security considerations: it should be recommended that the hash code, if computed from the address of the object, is not reversible. (Of course, with a copying collector you probably can't compute the hash code from the address).
Regards, Maciej
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