This is a spec. bug. Immediately before line10 of the algorithm there should
be a line that says:
Call the [[Put]] internal method of A with arguments "length",
actualDeleteCount, and true.
The ES3 spec. has the equivalent of the above line. It was apparently
inadvertently dropped in the ES5 spec.
Chrome's behavior (and also Firefox, I haven't checked others) matches the
intended ES3 behavior.
I'll file a bug against the the ES5 spec.
Allen
Chrome is correct
On Apr 9, 2012, at 8:19 AM, John-David Dalton wrote:
> Can someone confirm/reject that by spec (http://es5.github.com/#x15.4.4.12):
>
> // sparse array ;D
> var a=[0];
> a[2]=2;
>
> // the resulting arrays length should be 1 and not 2
> console.log(a.splice(0, 2).length);
>
> I'm seeing `2` in latest Chrome/FF.
>
> Thanks,
> -JDD
> _______________________________________________
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> es-discuss@mozilla.org
> https://mail.mozilla.org/listinfo/es-discuss
>
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