From: doug meyer <doug.meyer@...>
Date: 2007-08-31T11:50:49+09:00
Subject: Re: 0.06 == 0.06 returns false in Ruby?

There is also a class called BigDecimal (or something like that) if
you want to have really accurate numbers and no floating-point errors.

On 8/30/07, Dan Zwell <dzwell@gmail.com> wrote:
> Dan Zwell wrote:
> > To compare floats, you must ask whether they are within a certain
> > threshold of each other.
> > Epsilon = 0.00000000001
> > return (num1-num2).abs < Epsilon # num1 == num2
> >
> > Dan
> >
> >
>
> Oops, I didn't realize that Ruby comes with an Epsilon. This should be a
> fine test for equality:
>
> return (num1-num2).abs < Float::EPSILON
>
> Now, whether Float#==(other) should make this check might be worth
> thinking about, but I really have no opinion on the matter--I'm used to
> not comparing floats like this.
>
> Dan
>
>