On Jul 12, 2013, at 3:54 PM, Jeff Walden wrote:

> On 07/12/2013 10:27 AM, Tab Atkins Jr. wrote:
>> And, because of what we discussed in the recent thread...
>> 
>> Number.isInteger(Math.pow(2,53)-1) == true
>> Number.isInteger(Math.pow(2,53)) == false
> 
> I need to comment in the other thread again and push back against what people have said there, but that thread's issues aside entirely, this is very very wrong.  2**53 is an integer.  That there are multiple mathematical integer values that, when converted to IEEE-754 format, are equal to 2**53 is irrelevant.  An integer value, that operations claim is not an integer, is very very wat.

are you suggesting that if we want such an function, it should be named something else, such as isExactInteger,  isPreciseInteger, isUnambiguousInteger, etc?

Allen

On Jul 12, 2013, at 3:54 PM, Jeff Walden wrote:

> I need to comment in the other thread again and push back against what people have said there, but that thread's issues aside entirely, this is very very wrong.  2^53 is an integer.  That there are multiple mathematical integer values that, when converted to IEEE-754 format, are equal to 2^53 is irrelevant.  An integer value, that operations claim is not an integer, is very very wat.

are you suggesting that if we want such an function, it should be named something else, such as isExactInteger,  isPreciseInteger, isUnambiguousInteger, etc?