Hi Andrea, It seems that what you want can be implemented as a library [1] (actually you did it as well in your blog post). In this gist, a cache is used. In a nutshell, it is a '(function, object) -> boundFunction' mapping. I used 2 levels of WeakMaps to achieve this.
I don't think a native implementation could be that much more efficient neither in space nor time. Assuming my implementation does what you need, what would be the benefit of a native implementation over what I propose? David [1] https://gist.github.com/1567494 Le 05/01/2012 14:54, Andrea Giammarchi a écrit : > I have thought it may be interesting to receive some comment here too > ... so here the short summary: > > genericCallback.bind(sameObject) !== genericCallback.bind(sameObject) > > quite inconvenient for listeners and leading to uncomfortable patterns > ( store the bound reference somewhere and get it back later ) > > plus bind, at the end of a function, where the topic is the context, > looks more like a yoda statement > > "function with context as this object" > > rather than > > "object as context of this function" > > So, the proposal, is a simplified Object.prototype.boundTo ( or > eventually, to avoid conflicts with bind signature > Object.prototype.asContextOf ) > where the action is object, as context, related, and the returned > function is one and one only > > sameObject.boundTo(genericCallback) > === sameObject.boundTo(genericCallback) > > or, if you prefer > > sameObject.asContextOf(genericCallback) > === sameObject.asContextOf(genericCallback) > > Here the whole post with better examples plus the proposed solution > that would be nice to have in JS.Next > http://webreflection.blogspot.com/2012/01/improving-functionprototypebind.html > > Best Regards, > Andrea Giammarchi > > > _______________________________________________ > es-discuss mailing list > [email protected] > https://mail.mozilla.org/listinfo/es-discuss
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