Use cases for WeakMap
waldron.rick at gmail.com
Sun May 15 11:20:57 PDT 2011
Thanks Brendan, I was looking for something that was representative of
Boris's use-case, but I appreciate the snippet none-the-less.
I should clarify my intentions; while your example is very straight forward,
it's also as ambiguous as the gist I had originally posted that Alex,
yourself and I shared a discussion on - only in that it doesn't illustrate
the behaviour of the weakmap that has had a nulled key, post-GC.
I'm coming at this from the perspective of an js application developer and
thinking "how do I synthesize this into something that developers can
understand the benefit of and apply to real-world uses?", in short:
Either way, thanks again!
On Sun, May 15, 2011 at 2:02 PM, Brendan Eich <brendan at mozilla.com> wrote:
> On May 14, 2011, at 6:06 PM, Rick Waldron wrote:
> Would you mind sharing a piece of working code (as in, runs in the latest
> Firefox Nightly) that demonstrates your example in a real world scenario?
> This would be greatly appreciated
> just alerted "hi" in my slightly out of date tracemonkey-repo nightly
> On Sat, May 14, 2011 at 8:55 PM, Boris Zbarsky <bzbarsky at mit.edu> wrote:
>> On 5/14/11 6:37 PM, Oliver Hunt wrote:
>>> Can you provide a use case where you have an object key as the usual
>>> programming idiom?
>> Attaching metadata to object without polluting the objects themselves.
>> For example, Firefox extensions want to do this all the time for various
>> DOM objects (and especially Window).
>> es-discuss mailing list
>> es-discuss at mozilla.org
> es-discuss mailing list
> es-discuss at mozilla.org
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