Thoughts on IEEE P754
drj at ravenbrook.com
Fri Aug 22 09:26:06 PDT 2008
On 22 Aug 2008, at 15:22, Jason Orendorff wrote:
> On Fri, Aug 22, 2008 at 6:22 AM, Sam Ruby <rubys at intertwingly.net>
>> On Fri, Aug 22, 2008 at 2:30 AM, Jason Orendorff
>> <jason.orendorff at gmail.com> wrote:
>>> var a = ;
>>> a = "first";
>>> a[0.0m] = "second"; // a second property?
>>> a[0.000m] = "third"; // a third?
>> It seems to me that if trailing zeros are retained in a call to
>> ToString, then to be consistent with ES3, the three assignments above
>> would produce three properties. And if trailing zeros are lost, you
>> would expect to only have one. Both approaches are internally
>> consistent, and it surprises me to see either one characterized as
>> "breaking" array lookup.
> Well, the intuition is that two equal numbers should index the same
> property. This is an invariant in ES3 and it makes a lot of sense.
It's not quite an invariant in ES3. See my earlier message on the
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