2014-12-30 18:53 GMT+01:00 Clément Bera <[email protected]>: > > > 2014-12-30 17:14 GMT+01:00 [email protected] <[email protected]>: > >> >> Le 30 déc. 2014 13:13, "Clément Bera" <[email protected]> a écrit : >> > >> > Hello Pharoers, >> > >> > I was wondering, is it a good practice to have negative hashes ? >> > >> > Based on the class comment of Object>>#hash >> > >> > "Answer a SmallInteger whose value is related to the receiver's >> identity. [...]" >> > >> > The hash is a smallInteger and therefore can be negative. >> >> Why would this be a poor practice if seen as a set of bits? >> >> As long as it does its job for identifying buckets, it looks okay to me. >> >> More bits with good spreading is more space for the hashes. >> >> Now hash should be redefined along with equals if we run into large sets >> to limit collisions. And I guess we wouldn't keep SmallInteger then. >> >> Why the question? >> > > Well I am fixing compiled method to support negative compiled method > header and the compiled method hash may now be negative if its compiled > method header is. That's why. > > > But -1 hash -> -1 already, so I don't see any problem...
Nicolas > Phil >> >> > >> > Thanks for any answer. >> > >> > Clement >> > >
