If you wish, you can maintain a WeakMap of observed objects. If you
wish to never process a changeRecord for an object you've stopped
observing, you can simply check the WeakMap to see if it's still
observed.
On Fri, Nov 2, 2012 at 9:50 PM, Andrea Giammarchi
andrea.giammar...@gmail.com wrote:
In my experience, it is very common to want to process changeRecords that
were created, even if you letter turned off the observer. Turning off
observers (in particular, temporarily), can be useful for avoiding certain
kinds of cycles when creating bidrectional links.
On Sat, Nov 3, 2012 at
Andrea,
I believe the example is correct. The way the API works is this:
Object.observe and Object.unobserve both *synchronously*
register/unregister your callback as observing/unobserving any given
object. The asynchrony has to do with having changeRecords delivered
-- that happens
hey, thanks for coming back. The asynchronous unobserve in the meaning that
Object.unobserve is performed synchronously but the delivery of records is
asynchronous and performed regardless the object is not observed anymore.
Inside the observer each record can point to an object that is no more
Take for example:
function myCallback(recs) {
console.log(recs.length);
}
var obj = {};
Object.observe(obj, myCallback);
obj.a = 1; // enqueues changeRecord
obj.b = 2; // enqueues changeRecord
Object.unobserve(obj, myCallback);
obj.c = 3; // does not enqueue changeRecord
In the above
Main reason to use observe, in my opinion, is the ability to react on
changes. The moment an observer implements this reacting logic there's no
way it can work as expected if the object, or one of them, in the list of
records, is not observed anymore.
Let's say the object is not observed because
On Fri, Nov 2, 2012 at 12:22 PM, Andrea Giammarchi
andrea.giammar...@gmail.com wrote:
How to make this simple ... if I switch off the TV I don't expect any eco
after ... I don't care about the program, it should not bother me.
If you stick to the TV analogy... You don't want Tivo to erase what
fair enough, but I want to know what I am seeing is recorded and the TV is
switched off ... how? Flagging records? Flagging objects? Via getNotifier ?
On Fri, Nov 2, 2012 at 11:56 AM, Erik Arvidsson erik.arvids...@gmail.comwrote:
On Fri, Nov 2, 2012 at 12:22 PM, Andrea Giammarchi
Just wondering if this is actually meant/expected, I am talking about the
example here:
http://wiki.ecmascript.org/doku.php?id=harmony:observe#example
and the fact it should show something in console while in my opinion that
should show nothing since the Object.unobserve is called in the same
On Thu, Nov 1, 2012 at 4:32 PM, Andrea Giammarchi
andrea.giammar...@gmail.com wrote:
Just wondering if this is actually meant/expected, I am talking about the
example here:
http://wiki.ecmascript.org/doku.php?id=harmony:observe#example
I'm not sure I understand your point. The example is not
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