Chrome Canary behaves similarly (with the difference that the Set constructor can't convert an array), Olov reported an issue: https://code.google.com/p/v8/issues/detail?id=3069
This is probably just code based on non-recent drafts as not equating them would be bad for reasons Olov outlined in his post. Why WeakMap/WeakSet continue differentiating between +0 and -0? On Mon, Dec 23, 2013 at 1:11 AM, Rick Waldron <[email protected]> wrote: > > > > On Sun, Dec 22, 2013 at 6:41 PM, Mark S. Miller <[email protected]> wrote: >> >> No, Map and Set will equate -0 and +0. > > > In SpiderMonkey's Set and Map: > > var s = new Set([-0, +0]); > s.size; // 2 > > var m = new Map(); > m.set(-0, 1); > m.set(+0, 2); > > m.get(-0); // 1 > m.get(+0); // 2 > > > > Rick > > > _______________________________________________ > es-discuss mailing list > [email protected] > https://mail.mozilla.org/listinfo/es-discuss > -- Michał Z. Gołębiowski _______________________________________________ es-discuss mailing list [email protected] https://mail.mozilla.org/listinfo/es-discuss
