On Jun 14, 2012, at 3:10 PM, T.J. Crowder wrote:
> Making a point of making this a separate thread from the current ?? and ??=
> thread(s), which are thankfully looking close to consensus. So that's infix
> and assignment.
>
> Question: Should we consider unary as well?
>
> I ask because I went searching through my code (and others') to see where I'd
> get a lot of use out of ?? and ??=, and I will, but I also found a **lot** of:
>
> // 1
> if (typeof foo === "undefined") { // Or foo === undefined
> // ...
> }
This is a different issue, but I wonder how badly the web would break if we
made undefined a reserved word. Does anybody in JS really declare a different
local binding for undefined? In ES5 we got away with making undefined
read-only. Maybe we should continue pushing and see if we can eliminate the
rebindable undefined hazard.
Allen
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