Existential operator (was: ||= is much needed?)

[Aymeric Vitte]

OK, ?. is enough and good

Le 18/06/2012 16:48, Brendan Eich a écrit :
> Aymeric Vitte wrote:
>> Why not, instead of adding "?" operator ? 
>
> You mean ?. here, I assume.
>
> The answer is because what you propose is an incompatible change to 
> ECMA-262 (all editions) and JS back to its birth, which lets programs 
> that throw currently continue to run, with possibly disastrous 
> consequences (undefined flowing into the bank-balance database as 
> NaN). There is no way that this kind of potentially-bug-hiding 
> behavior should be the default semantics. It must be explicitly 
> opted-into via new syntax.
>
> /be

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