On Mon, Feb 23, 2015 at 11:59 AM, Isiah Meadows <isiahmead...@gmail.com> wrote: > > On Feb 23, 2015 6:06 AM, "Andrea Giammarchi" <andrea.giammar...@gmail.com> > wrote: > > > On Sun, Feb 22, 2015 at 11:18 PM, Jordan Harband <ljh...@gmail.com> > wrote: > [...]
> >> - We'd definitely want `Map.empty` and `Set.empty` assuming > `Object.freeze` actually froze them > > Object.freeze does not freeze them, as far as I know. It might require > method overrides. > Object.freeze does not freeze their state. A proposal for a way to either freeze the state of collections, and/or to create frozen snapshots of collections, for future ES would be welcome and appreciated. I encourage any such effort to pay attention to Clojure and React. > >> - We'd probably want > `Object.freeze(Object.seal(Object.preventExtensions(empty)))`, to be extra > restrictive. > > Doesn't Object.freeze imply the other two? I thought it did. > It does. Given that all these methods of Object have their original value and that x is not a proxy Object.freeze(Object.seal(Object.preventExtensions(x))) must be equivalent to Object.freeze(x) -- Cheers, --MarkM
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