On Nov 11, 2011, at 6:55 PM, Allen Wirfs-Brock <[email protected]> wrote:
> > On Nov 11, 2011, at 3:39 PM, Oliver Hunt wrote: > >> A weak map can only remove an entry if both the key and value have died, in >> many ES implementations a number of the primitives are not gc allocated and >> so can never die, or are cached globally so have lifetime unrelated to any >> given program. > > Yes, but this isn't just an implementation decision. The primitive values > have existential identify (my term, philosophers may mean something else). > All such values conceptually exist for all time, regardless of whether or not > an instance of a particular value is actually instantiated an any particular > point in time. Regardless of the implementation of primitive values, couldn't we say that the semantics of a weak map ignore primitive keys and look only at the value. Primitive keys are exceptionally common for maps, and this would open up a lot of potential uses, especially regarding caching. > > Allen > _______________________________________________ > es-discuss mailing list > [email protected] > https://mail.mozilla.org/listinfo/es-discuss _______________________________________________ es-discuss mailing list [email protected] https://mail.mozilla.org/listinfo/es-discuss
