I really need to know why WeakMaps don't accept primitives as keys, can anyone please reply ?
Thanks! -- Irakli Gozalishvili Web: http://www.jeditoolkit.com/ Address: 29 Rue Saint-Georges, 75009 Paris, France (http://goo.gl/maps/3CHu) On Thursday, 2011-11-10 at 10:31 , Irakli Gozalishvili wrote: > Hi, > > I was wondering what is a reason for disallowing non-object values as keys in > WeakMaps ? > > Also, I think I have a pretty good use case for primitive keys: > > Worker process sends messages to the (main) UI process, to initiate UI > notification. If user clicks that notification main process will worker know > that given notification was clicked: > > (function(exports) { > > let id = 0 > let listeners = WeakMap() > > exports.notify = function notify({ onClick, message }) { > if (onClick) listeners.set(++id, onClick) > self.postMessage({ id: id, message: message }) > } > > self.onmessage = function({ id }) { > let listener = listeners.get(id) > if (listener) listener() > } > > })(this) > > Is my use case invalid ? At the moment I use custom map implementation with a > limited size, once map hits the limit oldest entries will be removed. > > Regards > -- > Irakli Gozalishvili > Web: http://www.jeditoolkit.com/ > Address: 29 Rue Saint-Georges, 75009 Paris, France (http://goo.gl/maps/3CHu) >
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