mikesamuel at gmail.com
Tue Jun 27 20:36:24 UTC 2017
On Tue, Jun 27, 2017 at 4:29 PM, Isiah Meadows <isiahmeadows at gmail.com> wrote:
> On Tue, Jun 27, 2017, 16:19 Mike Samuel <mikesamuel at gmail.com> wrote:
>> On Tue, Jun 27, 2017 at 4:13 PM, Isiah Meadows <isiahmeadows at gmail.com>
>> > For what it's worth, for most practical purposes, `arr.sort((a, b) => b
>> > -
>> > a))` works well enough. (The only thing it doesn't work well with are
>> > NaNs,
>> > but in practice, those almost never occur.)
>> Don't numeric comparison operators typically sort -0 before +0?
> zeroes are relevant is in division.
There are others.
>> ((a,b)=>b-a) is also problematic for an array that contains two or
>> more infinite values with the same sign and one or more finite values
>> since isNaN(Infinity-Infinity). That NaN from the comparator can be
>> triggered or not based on details of the sorting algo and the precise
>> placement on the Infinities.
> Infinities have also been similarly rare for me except in isolation.
Fair enough. There are more builtins that produce Infinity though.
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