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: developer education/relations. Either way, thanks again! Rick On Sun, May 15, 2011 at 2:02 PM, Brendan Eich <[email protected]> wrote: > On May 14, 2011, at 6:06 PM, Rick Waldron wrote: > > Boris, > > 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 > > > javascript:k = {}; v = "hi"; w = WeakMap(); w.set(k, v); alert(w.get(k)) > > just alerted "hi" in my slightly out of date tracemonkey-repo nightly > build. There may be some javascript: URL stripping or blocking you have to > get past, in which case use the code after the javascript: in the Web > Console. > > /be > > > > Rick > > On Sat, May 14, 2011 at 8:55 PM, Boris Zbarsky <[email protected]> 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). >> >> -Boris >> >> _______________________________________________ >> es-discuss mailing list >> [email protected] >> https://mail.mozilla.org/listinfo/es-discuss >> > > _______________________________________________ > es-discuss mailing list > [email protected] > https://mail.mozilla.org/listinfo/es-discuss > > >
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