With the availability of constants and Symbols you could easily create what SHOULD be a memory efficient event library.
On Thu, Jul 11, 2013 at 3:04 PM, Andrea Giammarchi < [email protected]> wrote: > trivial like ... 2 weak maps + a set for a single event ? > > ```javascript > obj.on(evt, handler); > ``` > > .. internals ... > > ```javascript > // wm as private internal generic WeakMap > if (!wm.has(obj)) { > // creates related WeakMap > wm.set(obj, new WeakMap); > } > if (!wm.get(obj).has(evt)) { > wm.get(obj).set(evt, new Set); > } > wm.get(obj).get(evt).add(handler); > ``` > > I have the feeling it's very true in JS world nobody ever thinks about RAM > and GC ^_^ > > That said, it becomes over complicated for non concrete reason/use case if > we have strings since AFAIK WeakMap does not accept strings as key. > > For all this time the event type as string has blocked like ... nobody > ever ? I wonder again what's the benefit then to instantly over complicate > an API at this stage instead of looking around what worked already for > everyone. > > Maybe it's me not seeing the power of objects as events. > > br > > > > On Thu, Jul 11, 2013 at 2:32 PM, Rick Waldron <[email protected]>wrote: > >> >> >> >> On Thu, Jul 11, 2013 at 4:45 PM, Andrea Giammarchi < >> [email protected]> wrote: >> >>> I would simplify saying that symbols can be used as well as strings ? I >>> don't see any usefulness into using an object as event type and I think if >>> we start olready over-engineered/complicated this will never see the light >>> in any spec which is a lost/lost if you ask me >>> >> >> It's trivial if an Emitter uses something like [[MapData]] or >> [[WeakMapData]] as it's internal data property for event storage. >> >> >> Rick >> >> > > _______________________________________________ > es-discuss mailing list > [email protected] > https://mail.mozilla.org/listinfo/es-discuss > > -- - Matthew Robb
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