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From Gary Gregory <GGreg...@seagullsoftware.com>
Subject RE: LANG - useful to have float/double equals method?
Date Wed, 12 Jan 2011 17:24:56 GMT
> -----Original Message-----
> From: Henri Yandell [mailto:flamefew@gmail.com]
> Sent: Wednesday, January 12, 2011 11:29
> To: Commons Developers List
> Subject: Re: LANG - useful to have float/double equals method?
> 
> -1 on enhancements in LANG 2.x; by which I mean that I personally am
> not interested in spending effort on 2.x being anything other than a
> critical bugfix legacy version.

>2.x being anything other than a
> critical bugfix legacy version.

+1, let's focus on getting 3.0 out! :)

Gary

> 
> Hen
> 
> On Wed, Jan 12, 2011 at 8:21 AM, sebb <sebbaz@gmail.com> wrote:
> > On 12 January 2011 15:31, Ted Dunning <ted.dunning@gmail.com> wrote:
> >> Why aren't the comparison methods in java (since 1.4) good enough?
> >
> > 1) LANG 2.x targets 1.3
> >
> > 2) compare does not take into account that floats/doubles are inexact,
> > so some tolerance is needed.
> >
> > See http://www.cygnus-
> software.com/papers/comparingfloats/comparingfloats.htm
> > for useful explanation.
> >
> > Furthermore, both compare() and equals() treat +0 and -0 as being unequal.
> >
> >>
> http://download.oracle.com/javase/1.4.2/docs/api/java/lang/Double.html#compare
> (double,
> >> double)
> >>
> >>
> http://download.oracle.com/javase/1.4.2/docs/api/java/lang/Float.html#compare(
> float,
> >> float)
> >>
> >> On Wed, Jan 12, 2011 at 3:15 AM, sebb <sebbaz@gmail.com> wrote:
> >>
> >>> Would it be useful to add an equals method for float/double?
> >>>
> >>
> >
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