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[Bug 14878] Rename const to legacyconst

From: <bugzilla@jessica.w3.org>
Date: Tue, 22 Nov 2011 06:34:34 +0000
To: public-script-coord@w3.org
Message-Id: <E1RSjwA-0001DF-CW@jessica.w3.org>

--- Comment #13 from Brendan Eich <brendan@mozilla.org> 2011-11-22 06:34:33 UTC ---
(In reply to comment #12)
> Why are bitmasks superior to boolean properties?

I'm not sure where that q came from. I'll give an a if you answer my q below

Boolean properties of an object are ok if you want to pass a bunch of flags and
you don't care about doing set union, intersection, or difference (at least not
efficiently for the case I mentioned: dense sets in [0,31]).

We're arguing in this bug not about best practices for most APIs, rather about
expressiveness in WebIDL, a language used for lots of APIs.


> (In reply to comment #11)
> > (In reply to comment #10)
> > > Bitmasks are not a good user-facing API for JavaScript. Anecdotally, SproutCore
> > > 1.x used bitmasks for some state management code in our data store API, and it
> > > was one of the most confusing (and "weird") parts of that API.
> > 
> > Can you say more? What were people confused about?

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Received on Tuesday, 22 November 2011 06:34:40 UTC

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