Re: Yosemite decimal number conversion error
Re: Yosemite decimal number conversion error
- Subject: Re: Yosemite decimal number conversion error
- From: Takaaki Naganoya <email@hidden>
- Date: Wed, 29 Oct 2014 16:16:39 +0900
2014/10/29 15:03、Shane Stanley <email@hidden> のメール：
> On 29 Oct 2014, at 3:22 pm, Takaaki Naganoya <email@hidden> wrote:
>> --> {-100, -1, 0.10000000149, 1, 1.100000023842, 10}--Result (!!!!)
>
> The problem is that many values can't be accurately stored as binary values -- there is always some rounding involved. The value 0.1 in binary is:
>
> 1100110011001100110011001100110011... ad infinitum.
>
> So somewhere along the line, some rounding is done. The net result is that the value depends on the precision it's stored in.
>
> But apart from looking a bit odd, what practical problem is there with the result you have above?
I can understand the mechanism. But I can not judge it as a bug or a spec.
bug: To be fixed in the near future
spec: Not to be fixed forever...
If this behavior is based on the Scripting Bridge system’s specification, it should be regretful.
If this behavior is a trivial bug, the programmer should be regretful.
A practical plan is not to use decimal number lists within AppleScriptObjC (cocoa-styled) handler for me.
--
Takaaki Naganoya
email@hidden
http://piyocast.com/as/
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