2013/12/23 Mark S. Miller
> No, Map and Set will equate -0 and +0.
>
\o/
Filed a bug on v8: https://code.google.com/p/v8/issues/detail?id=3069
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2013/12/23 Brendan Eich
> You are reasoning from general to particular, but without any reason to
> focus on the particular of redefining a non-writable property from -0 to +0
> or vice versa. There is no use-case "there" there! I bet Mark would find
> that a subtle security problem.
>
On the to
2013/12/4 Andreas Rossberg
> I don't understand. Why can't you do
>
> const val = compute(something)
> if (val) {
> // ...
> }
>
(also Axel)
Oops - yeah I sure could. consts are one honking great idea -- let's do
more of those! That's all. :)
/Olov
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2013/11/29 Nick Krempel
> Couldn't find anything on this in the archives, but is there a proposal
> for:
>
> if (let var = expr) {
> // var in scope
> }
> ...
> ("const" should also be OK in place of "let", at least for "if" and
> "switch".)
>
Thanks for taking this to the list. I was meaning
2013/10/30 Vyacheslav Egorov
> > Rationale being faster polyfilled execution
>
> The main reason for H being one shot is to allow optimizing compiler
> *elide* updating it in most cases to eliminate memory traffic.
>
Aaah. Thanks for pointing this out - I thought only of the polyfill
performance
2013/10/30 Vyacheslav Egorov
> 5. A one shot property Math.H is created that returns ch' on the first
> access and deletes itself.
>
Alternative step 5: Math.H is assigned ch'.
Rationale being faster polyfilled execution, in combination with a lack of
imagination from my side to come up with a
2013/4/21 Allen Wirfs-Brock
> Also note that JSON.parse('{"__proto__": null}') does not create an object
> whose [[Protoype]] is null because JSON.parse uses [[DefineOwnProperty]] to
> create all its properties so this will just result in an own property whose
> value is null.
Side-tracking t
2012/12/14 Allen Wirfs-Brock
> BTW, I think there are probably other related issues that need to be
> discussed/resolved at that level. For example, is SameValue really want we
> want for Map/Set equivalence (the -0 different from +0 issue), did we agree
> to parameterize the equivalance operato
Hello,
I've been thinking about our IEEE-inherited positive and negative zero and the
proposed ES6 Object.is and new collections semantics. I haven't followed any
discussions about this so I'm basing my understanding purely on the Harmony
wiki and toying around with the preliminary support in v8
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