From: Husein Choroomi <hchoroomi@...>
Date: 2007-04-01T01:05:11+09:00
Subject: Re: NaN return

> so 0.693524996891893 seems to be greater than 0.197314075476553 ????

becasue 0.6 is greater than 0.1 !


On 3/31/07, Josselin <josselin@wanadoo.fr> wrote:
> On 2007-03-31 16:43:58 +0200, "Luis Parravicini" <lparravi@gmail.com> said:
>
> > On 3/31/07, Josselin <josselin@wanadoo.fr> wrote:
> >> something like..
> >> cd = proposal.distance_to(current_city) != NaN ?
> >> proposal.distance_to(current_city) : 0.0
> >
> >   Float has a 'nan?' method
> > (http://www.ruby-doc.org/core/classes/Float.html#M000244).
>
> thanks, I got it to test and replace cd :   cd = 0.0 if cd.nan?
>
> Float comparison is quite strange  :
> cd = 0.0
> => 0.0
>
> irb(main):010:0> d = 0.197314075476553
> => 0.197314075476553
>
> irb(main):011:0> (cd <=> d) > 0
> => false
>
> BUT .....
>
> irb(main):006:0> cd = 0.693524996891893
> => 0.693524996891893
>
> irb(main):007:0> d = 0.197314075476553
> => 0.197314075476553
>
> irb(main):008:0> (cd <=> d) > 0
> => true
>
> so 0.693524996891893 seems to be greater than 0.197314075476553 ????
>
>
>


-- 
Husein Choroomi,
CEO, CTO
Yucca Intelligence Development
http://www.YuccaHQ.com

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