On Wed, Oct 3, 2012 at 3:36 PM, Brendan Eich <bren...@mozilla.org> wrote:
> Rick Waldron wrote: > >> On Wed, Oct 3, 2012 at 2:04 PM, Rick Waldron <waldron.r...@gmail.com<mailto: >> waldron.r...@gmail.com**>> wrote: >> >> >> >> On Wed, Oct 3, 2012 at 1:43 PM, Brandon Benvie >> <bran...@brandonbenvie.com >> <mailto:brandon@brandonbenvie.**com<bran...@brandonbenvie.com>>> >> wrote: >> >> Another options for Maps is to represent them as an array of >> [key, value]. >> >> >> Which is a rough approximation of what a Map looks like internally. >> >> >> >> Sorry, this is incorrect. Map looks more like: >> >> [key1, key2] >> [value1, value2] >> >> Sorry for confusion >> > > As an implementation in ES5, maybe (O(n) lookup cost). But the thing to > aim for is the shape of the Map parameter, and that looks like > > [[key1, value1], [key2, value2]] > > Still need type tagging to revive as a Map, of course. > > JSON object notation can't handle Map, though: key can be any value > (ignore JSON not handling all JS values). Ugh, sorry, I replied to myself/Dean above before reading ahead. Rick > > > /be >
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