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

[Jeremy Ashkenas]

On Tue, Jun 19, 2012 at 2:59 PM, Brendan Eich <brendan at mozilla.org> wrote:

> Herby Vojčík wrote:
>
>> Will you include options.success?.[index] then, too?
>>
>
> I wasn't planning on it. CoffeeScript does not have any such thing
> (spelling it ?[ would be hard in CS too, due to array literals). Could add
> it in the future, trying not to overdo the strawman at this point. YAGNI
> and KISS and when-in-doubt-leave-it-out all are against it.


Actually, CoffeeScript definitely has it for consistency's sake:

http://coffeescript.org/#try:object.property%3F%5Bone%5D

... we don't have a problem with being whitespace-sensitive for situations
like this.
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