Sam Ruby wrote:
> On Fri, Aug 22, 2008 at 2:28 PM, Waldemar Horwat <[EMAIL PROTECTED]> wrote:
>> Sam Ruby wrote:
>>> Waldemar Horwat wrote:
>>>> Some tidbits about our embedding of decimal:
>>>>
>>>> - Contagion should be towards decimal if decimal and binary are mixed
>>>> as operands. 5.3m + 1 should be 6.3m, not 6.3. If we use 128-bit
>>>> decimal, this also makes the behavior of heterogeneous comparisons
>>>> (binary compared to decimal) sensible.
>>> What should 5.3m + 1.0000000000000001 produce?
>>>
>>> I also don't understand the heterogeneous comparisons comment. What
>>> should 1.0000000000000001 == 1.0000000000000001m produce?
>> Depends. There are many decimal formats. Which decimal format and
>> representation are you specifying?
>
> Decimal128. But the key to this question is the fact that the
> binary64 floating point constant is indistinguishable from the value
> 1.
If you're using Decimal128, then 1.0000000000000001 == 1.0000000000000001m is
false because the double on the left evaluates to 1. If you're using
Decimal64, then 1.0000000000000001 == 1.0000000000000001m is true because both
sides evaluate to their respective versions of 1.
Here's a question for you:
What should the full result of converting 1.1 to a Decimal be in ECMAScript?
Describe the precise answer and justify your choice of answer. Hint: This
would behave remarkably differently depending on whether we settle on Decimal64
or Decimal128.
Waldemar
_______________________________________________
Es-discuss mailing list
[email protected]
https://mail.mozilla.org/listinfo/es-discuss
