On Saturday, August 3, 2019 at 9:22:16 AM UTC+8, Jesse Wang wrote: > > Racket allows different types of keys in a single hash, so there must be a > hash function that works for different types(different primitive types), I > wonder how Racket implements this under the hood. > Also, If I want to implement a hash table which allows different types of > keys, how can I implement such a hash function in Racket? > > Thanks! >
It seems for functions like equal-hash-code and eq-hash-code, different primitive type have different rules for calculating the hash value, for example: > (equal-hash-code 123) 123 > (equal-hash-code '123) 123 > (equal-hash-code "123") 115049109349 > (equal-hash-code 123.0) 1432682342767248795 the result hash values are not uniformly distributed. If I want to turn the hash code into array index in a hash table, do I need to apply another uniform hash function such as md5 on the result of equal-hash-code? -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/racket-users/eea3bd1a-7a4f-48fe-97e0-ba65738a7ae1%40googlegroups.com.
